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CN110400970B - Electrolyte material and application thereof in high-temperature lithium battery - Google Patents

Electrolyte material and application thereof in high-temperature lithium battery Download PDF

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CN110400970B
CN110400970B CN201910480400.XA CN201910480400A CN110400970B CN 110400970 B CN110400970 B CN 110400970B CN 201910480400 A CN201910480400 A CN 201910480400A CN 110400970 B CN110400970 B CN 110400970B
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battery
lithium battery
electrolyte
lithium
capacity
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CN110400970A (en
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侯伟
侯民
郭农庆
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Jiangxi Lineng New Energy Technology Co ltd
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/056—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
    • H01M10/0564—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes the electrolyte being constituted of organic materials only
    • H01M10/0566—Liquid materials
    • H01M10/0567—Liquid materials characterised by the additives
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/056—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
    • H01M10/0564—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes the electrolyte being constituted of organic materials only
    • H01M10/0566—Liquid materials
    • H01M10/0569—Liquid materials characterised by the solvents
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2300/00—Electrolytes
    • H01M2300/0017—Non-aqueous electrolytes
    • H01M2300/0025—Organic electrolyte
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2300/00—Electrolytes
    • H01M2300/0017—Non-aqueous electrolytes
    • H01M2300/0025—Organic electrolyte
    • H01M2300/0028—Organic electrolyte characterised by the solvent
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

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  • Condensed Matter Physics & Semiconductors (AREA)
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  • Secondary Cells (AREA)

Abstract

The invention provides an electrolyte material of a lithium battery, which comprises 1-hexadecyl-3-methylimidazole bromide or 1-methyl-3-octyl imidazole chloride or 1-hexadecyl-3-methylimidazole nitrate and Ge 3 N 4 Or GaN, liBF 4 Or LiPF 6 Or LiClO 4 . Compared with the electrolyte in the prior art, the conductivity of the prepared high-capacity lithium battery resistant to the high temperature of at least 300 ℃ is higher than that of the traditional electrolyte, and meanwhile, the prepared battery has larger charge-discharge capacitance which reaches 180mAh/g, and can be safely used in a high-temperature environment.

Description

Electrolyte material and application thereof in high-temperature lithium battery
Technical Field
The invention belongs to the field of lithium batteries, and particularly relates to an electrolyte material and application thereof to a high-temperature lithium battery.
Background
The widespread use of lithium batteries has proven to be a very reliable battery technology in the last decade. Lithium batteries are widely used in electric automobiles, cellular phones, cameras, notebook computers, and other mobile devices. Lithium batteries are even used for energy storage in the electrical grid. The lithium battery has high voltage and light weight. The average voltage of one single battery can reach 3.7V or 3.2V, which is relatively equal to the series voltage of 2-4 nickel-hydrogen batteries or nickel-isolation batteries. The energy and density of the lithium battery are also very high for other batteries, the lithium battery has high energy storage density, the density of the lithium battery commonly used at present can reach 450-620Wh/kg, which is 5-7 times that of a lead-acid battery, and the weight of one lithium battery is about 5-6 times that of the lead-acid battery compared with the weight of the battery. The service life of the lithium battery is long, the service life of one lithium battery can be used for more than 6 years under the condition of no accident, the service life of one lithium battery can be up to 9 years, the normal use times are more than 1000 times, and the service life of one lithium battery can be up to more than 1500 times under the condition of no accident. The self-discharge is low, no memory effect exists, the lithium battery body is provided with the protection plate in the production of the lithium battery, the lithium battery has an effect of overcharging and overdischarging, the lithium battery has high power bearing capacity, and the lithium battery selected by the electric automobile can reach high effect capacity of 15-30C charge and discharge, so that the high-strength starting on the automobile is accelerated. The turnaround efficiency shows the efficiency of the battery in full charge and discharge cycles, which for lead storage batteries is typically about 75%, which means that if a 1000Wh lead storage battery is charged, only 750Wh of power is available to actually power your equipment, so that only the battery loses 25% of the system efficiency, which in the case of solar street lamps (or any other solar system) means that at least 25% more solar panels are needed to power the same load, under which conditions the system will inevitably become more expensive (or perform worse in the same configuration). However, for lithium batteries, the turnaround efficiency is about 98%. The depth of discharge is related to the depth of consumption of the battery in each cycle, the deeper the battery is discharged, the less the discharge cycle is, and therefore the shorter the service life of the battery is, the lithium battery can be easily discharged to 95%, and the lead battery can be limited to below 50%. If we want to use the battery for about 2000 cycles (2000/365 days=5, 5 years), only the lead battery can be discharged 25-35%, while the lithium battery can be discharged only around 80%. This means that at least 4 times the lithium battery capacity is required to obtain the same battery life of the lead battery, or in other words, if 80% of the battery capacity is used, only 250-500 cycles of the lead battery, instead of 2000 cycles of the lithium battery, must be used, and the lead battery must be replaced 4-8 times than the lithium battery.
In the market, the lithium battery is charged or used in the process of leakage or explosion often occurs, because the battery temperature is possibly too high in the charging or discharging process, and if the battery is not timely cooled, the electrolyte is leaked or the battery is expanded and exploded due to the too high local temperature, and in some cases, the use environment temperature of the lithium battery is originally higher, and the explosion is easier to occur in the use process, so that the electrolyte of the lithium battery capable of resisting the high temperature is urgently needed in the market.
Disclosure of Invention
The invention provides an electrolyte material and application thereof in a high-temperature lithium battery, so as to solve the problems in the background technology.
In order to achieve the above purpose, the present invention provides the following technical solutions: an electrolyte material of a lithium battery comprises the following raw materials in parts by weight: 30-65 parts of ionic liquid, 5-35 parts of additive and 20-68 parts of lithium salt, wherein the additive comprises at least one of the following components: si (Si) 3 N 4 、Al 2 O 3 、C 3 N 4 、Ge 3 N 4 GaN, BN, aluminum nitride. The ionic liquid is widely applied to various fields of chemical research due to the unique performance of the ionic liquid, the ionic liquid is used as a solvent for reaction and applied to various types of reactions, and the lithium battery electrolyte prepared by adding special nano conductor particles and lithium salt has higher conductivity due to the characteristics of non-volatility, high heat resistance, incombustibility, high ion conductivity, wide-range window and the like, so that the problem that the traditional lithium battery is not resistant to high temperature and has poor safety is solved.
Further, the ionic liquid comprises at least one of the following: 1-dodecyl-3-methylimidazole nitrate, 1-hexadecyl-3-methylimidazole hexafluorophosphate, 1-dodecyl-3-methylimidazole tetrafluoroborate, 1-decyl-3-methylimidazole nitrate, 1-tetradecyl-3-methylimidazole bromide, 1-decyl-3-methylimidazole tetrafluoroborate, 1-methyl-3-octylimidazolium chloride, 1-dodecyl-3-methyl-1H-imidazole sulfate, 1-hexadecyl-3-methylimidazole nitrate, 1-hexadecyl-3-methylimidazole bromide, 1-tetradecyl-3-methylimidazole nitrate. The ionic liquid with the special structure has better ionic conductivity, wider potential window, and the prepared electrolyte has high temperature resistance, large capacity and good safety.
Further, the lithium salt includes at least one of the following LiBF 4 、LiPF 6 、LiClO 4 、LiTFSI、LiAsF 6 、LiSbF 6 . The addition of a suitable lithium salt results in higher conductivity and capacity of the electrolyte and better heat resistance.
Further, the ionic liquid is 1-hexadecyl-3-methylimidazole bromide and/or 1-methyl-3-octyl imidazole chloride and/or 1-hexadecyl-3-methylimidazole nitrate. The electrolyte has higher conductivity and capacity and better heat resistance by adding special ionic liquid.
Further, the additive is Ge 3 N 4 And/or GaN. The electrolyte has higher conductivity and capacity and better heat resistance by adding special nano particles.
Further, the ionic liquid is 1-hexadecyl-3-methylimidazole nitrate, and the additive is GaN. The electrolyte has higher conductivity and capacity and better heat resistance by adding special ionic liquid and special nano particles.
Further, the content of the ionic liquid is 35-45 parts. The prepared electrolyte has higher conductivity and capacity and better heat resistance.
Further, the content of the additive is 20-35 parts. The prepared electrolyte has higher conductivity and capacity and better heat resistance.
Further, the lithium salt content is 35-50 parts. The prepared electrolyte has higher conductivity and capacity and better heat resistance.
A high temperature lithium battery, wherein the electrolyte material is any one of the lithium battery electrolyte materials. And preparing the high-capacity lithium battery resistant to the high temperature of 300 ℃.
Compared with the prior art, the invention has the following advantages:
(1) Compared with the electrolyte in the prior art, the conductivity is higher than that of the traditional electrolyte, and meanwhile, the prepared battery has larger charge-discharge capacitance which reaches more than 165 mAh/g.
(2) Can resist high temperature of at least 300 ℃ and can be safely used in high-temperature environment.
(3) Can bear 104N impact stress at least at 200 ℃, and has excellent performance.
(4) The preparation method has the advantages of breakthrough progress in the aspect of high-temperature lithium battery electrolyte, great industrial production prospect, simple preparation method and contribution to industrial stable production.
Detailed Description
In order that the manner in which the above recited features, objects and advantages of the present invention are obtained will become more readily apparent to those skilled in the art, a further explanation of the present invention will be provided in connection with the examples, it being understood that all examples set forth herein are intended to be illustrative only and are not intended to be limiting of the scope of the invention.
Example 1
The electrolyte material of lithium battery is prepared by adding 40g of 1-hexadecyl-3-methylimidazole nitrate ionic liquid into a 1L beaker, stirring by a magnetic stirrer, adding 37g of LiTFSI at a constant speed, stirring to a mutual dissolution state, adding 23g of GaN at a constant speed, stirring for 5 hours, performing ultrasonic treatment for 60 minutes, and stirring for 5 hours after ultrasonic treatment is finished, wherein the whole process is finished under the condition of isolating air, and preventing water from being absorbed in the air.
The electrolyte prepared in this example was tested for conductivity by AC impedance method, repeated 5 times and the average value was calculated, and the conductivity was measured to be 8.92×10 -3 S/cm. The electrolyte prepared in this example was put into a lithium battery system, and the positive electrode material used in the lithium battery was lithium nickel manganese cobalt oxide (LiNi 0.5 Mn 0.3 Co 0.2 O 2 ) The cathode material is lithium, and the charge and discharge test is carried out at 60 ℃, so that the charge capacity is 193mAh/g, the discharge capacity is 176mAh/g, the electrochemical window is larger than 4.5V, the charge and discharge are cycled for 100 times, and the capacity is maintained above 95%. The battery is charged and discharged for 10 times under the high temperature condition of 300 ℃, the deformation or electrolyte leakage phenomenon of the battery does not occur, and the battery capacity is kept to be more than 85% when the temperature is 60 ℃. At 200℃for 10 4 And the impact stress of N is tested, so that no leakage occurs.
Example 2
An electrolyte material of a lithium battery is prepared by adding 50g of 1-hexadecyl-3-methylimidazole nitrate ionic liquid into a 1L beaker, stirring by a magnetic stirrer, then adding 20g of LiTFSI at a constant speed, stirring to a mutual dissolution state, then adding 30g of GaN at a constant speed, stirring for 5 hours, then carrying out ultrasonic treatment for 60 minutes, and then stirring for 5 hours after ultrasonic treatment is finished, wherein the whole process is finished under the condition of isolating air, and the water in the air is prevented from being absorbed.
The electrolyte prepared in this example was tested for conductivity by AC impedance method, repeated 5 times and the average value was calculated, and the conductivity was measured to be 8.26X10 -3 S/cm. The electrolyte prepared in this example was put into a lithium battery system, and the positive electrode material used in the lithium battery was lithium nickel manganese cobalt oxide (LiNi 0.5 Mn 0.3 Co 0.2 O 2 ) The cathode material is lithium, and the charge and discharge test is carried out at 60 ℃, so that the charge capacity is 188mAh/g, the discharge capacity is 171mAh/g, the electrochemical window is larger than 4.5V, the charge and discharge are cycled for 100 times, and the capacity is maintained above 95%. The battery is charged and discharged for 10 times under the high temperature condition of 300 ℃, the deformation or electrolyte leakage phenomenon of the battery does not occur, and the battery capacity is kept to be more than 85% when the temperature is 60 ℃. At 200℃for 10 4 And the impact stress of N is tested, so that no leakage occurs.
Example 3
An electrolyte material of a lithium battery is prepared by adding 30g of 1-hexadecyl-3-methylimidazole nitrate ionic liquid into a 1L beaker, stirring by a magnetic stirrer, then adding 50g of LiTFSI at a constant speed, stirring to a mutual dissolution state, then adding 20g of GaN at a constant speed, stirring for 5 hours, then carrying out ultrasonic treatment for 60 minutes, and then stirring for 5 hours after ultrasonic treatment is finished, wherein the whole process is finished under the condition of isolating air, and the water in the air is prevented from being absorbed.
The electrolyte prepared in this example was tested for conductivity by AC impedance method, repeated 5 times and the average value was calculated, and the conductivity was measured to be 9.21×10 -3 S/cm. The electrolyte prepared in this example was put into a lithium battery system, and the positive electrode material used in the lithium battery was lithium nickel manganese cobalt oxide (LiNi 0.5 Mn 0.3 Co 0.2 O 2 ) The cathode material is lithium, and the charge and discharge test is carried out at 60 ℃, so that the charge capacity is 195mAh/g, the discharge capacity is 172mAh/g, the electrochemical window is larger than 4.5V, the charge and discharge are cycled for 100 times, and the capacity is maintained above 95%. The battery is charged and discharged for 10 times under the high temperature condition of 300 ℃, the deformation or electrolyte leakage phenomenon of the battery does not occur, and the battery capacity is kept to be more than 85% when the temperature is 60 ℃. At 200 DEG C10 4 And the impact stress of N is tested, so that no leakage occurs.
Example 4
An electrolyte material of lithium battery is prepared through adding 40g of 1-hexadecyl-3-methylimidazole nitrate ionic liquid into 1L beaker, stirring with magnetic stirrer, adding 37g of LiTFSI at uniform speed, stirring to mutual solubility, and adding Ge at uniform speed 3 N 4 23g, stirring for 5 hours, then ultrasonic for 60 minutes, stirring for 5 hours after ultrasonic treatment is finished, and preparing to obtain the electrolyte material, wherein the whole process is finished under the condition of isolating air, so that the water in the air is prevented from being absorbed.
The electrolyte prepared in this example was tested for conductivity by AC impedance method, repeated 5 times and the average value was calculated, and the conductivity was measured to be 8.87×10 -3 S/cm. The electrolyte prepared in this example was put into a lithium battery system, and the positive electrode material used in the lithium battery was lithium nickel manganese cobalt oxide (LiNi 0.5 Mn 0.3 Co 0.2 O 2 ) The cathode material is lithium, and the charge and discharge test is carried out at 60 ℃, so that the charge capacity is 189mAh/g, the discharge capacity is 171mAh/g, the electrochemical window is larger than 4.5V, the charge and discharge are cycled for 100 times, and the capacity is maintained above 95%. The battery is charged and discharged for 10 times under the high temperature condition of 300 ℃, the deformation or electrolyte leakage phenomenon of the battery does not occur, and the battery capacity is kept to be more than 85% when the temperature is 60 ℃. At 200℃for 10 4 And the impact stress of N is tested, so that no leakage occurs.
Example 5
The electrolyte material of lithium battery is prepared by adding 40g of 1-hexadecyl-3-methylimidazole nitrate ionic liquid into a 1L beaker, stirring by a magnetic stirrer, adding 37g of LiTFSI at a constant speed, stirring to a mutual dissolution state, adding 23g of aluminum nitride at a constant speed, stirring for 5 hours, performing ultrasonic treatment for 60 minutes, stirring for 5 hours, and obtaining the electrolyte material, wherein the whole process is completed under the condition of isolating air, and preventing water from being absorbed in the air.
The electrolyte prepared in this example was tested for conductivity by AC impedance method, repeated 5 times and the average value was calculated, and the conductivity was measured to be 8.89×10 -3 S/cm. The electrolyte prepared in this example was put into a lithium battery system, and the positive electrode material used in the lithium battery was lithium nickel manganese cobalt oxide (LiNi 0.5 Mn 0.3 Co 0.2 O 2 ) The cathode material is lithium, and the charge and discharge test is carried out at 60 ℃, so that the charge capacity is 188mAh/g, the discharge capacity is 172mAh/g, the electrochemical window is larger than 4.5V, the charge and discharge are cycled for 100 times, and the capacity is maintained above 95%. The battery is charged and discharged for 10 times under the high temperature condition of 300 ℃, the deformation or electrolyte leakage phenomenon of the battery does not occur, and the battery capacity is kept to be more than 85% when the temperature is 60 ℃. At 200℃for 10 4 And the impact stress of N is tested, so that no leakage occurs.
Example 6
The electrolyte material of lithium battery is prepared by adding 40g of 1-hexadecyl-3-methylimidazole bromide ionic liquid into a 1L beaker, stirring by a magnetic stirrer, adding 37g of LiTFSI at constant speed, stirring to a mutual dissolution state, adding 23g of GaN at constant speed, stirring for 5 hours, performing ultrasonic treatment for 60 minutes, stirring for 5 hours, and obtaining the electrolyte material, wherein the whole process is completed under the condition of isolating air, and preventing water from being absorbed in the air.
The electrolyte prepared in this example was tested for conductivity by AC impedance method, repeated 5 times and the average value was calculated, and the conductivity was measured to be 8.97X10 -3 S/cm. The electrolyte prepared in this example was put into a lithium battery system, and the positive electrode material used in the lithium battery was lithium nickel manganese cobalt oxide (LiNi 0.5 Mn 0.3 Co 0.2 O 2 ) The cathode material is lithium, and the charge and discharge test is carried out at 60 ℃, so that the charge capacity is 191mAh/g, the discharge capacity is 172mAh/g, the electrochemical window is larger than 4.5V, the charge and discharge are cycled for 100 times, and the capacity is kept above 95%. The battery is charged and discharged for 10 times under the high temperature condition of 300 ℃, the deformation or electrolyte leakage phenomenon of the battery does not occur, and the battery capacity is kept to be more than 85% when the temperature is 60 ℃. At 200℃for 10 4 And the impact stress of N is tested, so that no leakage occurs.
Example 7
An electrolyte material of a lithium battery is prepared by adding 40g of 1-methyl-3-octyl imidazole chloride ionic liquid into a 1L beaker, stirring by a magnetic stirrer, adding 37g of LiTFSI at a constant speed, stirring to a mutual dissolution state, adding 23g of GaN at a constant speed, stirring for 5 hours, performing ultrasonic treatment for 60 minutes, and stirring for 5 hours after the ultrasonic treatment is finished, wherein the whole process is finished under the condition of isolating air, and preventing water from being absorbed in the air.
The electrolyte prepared in this example was tested for conductivity by AC impedance method, repeated 5 times and the average value was calculated, and the conductivity was measured to be 9.01X10 -3 S/cm. The electrolyte prepared in this example was put into a lithium battery system, and the positive electrode material used in the lithium battery was lithium nickel manganese cobalt oxide (LiNi 0.5 Mn 0.3 Co 0.2 O 2 ) The cathode material is lithium, and the charge and discharge test is carried out at 60 ℃, so that the charge capacity is 193mAh/g, the discharge capacity is 179mAh/g, the electrochemical window is larger than 4.5V, the charge and discharge are cycled for 100 times, and the capacity is maintained above 95%. The battery is charged and discharged for 10 times under the high temperature condition of 300 ℃, the deformation or electrolyte leakage phenomenon of the battery does not occur, and the battery capacity is kept to be more than 85% when the temperature is 60 ℃. At 200℃for 10 4 And the impact stress of N is tested, so that no leakage occurs.
Example 8
An electrolyte material of lithium battery is prepared through adding 40g of 1-hexadecyl-3-methylimidazole nitrate ionic liquid into 1L beaker, stirring with magnetic stirrer, and adding 37g of LiAsF at uniform speed 6 Stirring to a mutual dissolution state, adding 23g of GaN at a constant speed, stirring for 5 hours, performing ultrasonic treatment for 60 minutes, stirring for 5 hours after ultrasonic treatment is finished, and obtaining the electrolyte material, wherein the whole process is finished under the condition of isolating air, and preventing water in the air from being absorbed.
The electrolyte prepared in this example was tested for conductivity by AC impedance method, repeated 5 times and the average value was calculated, and the conductivity was measured to be 8.7X10 -3 S/cm. The electrolyte prepared in this example was put into a lithium battery system, and the positive electrode material used in the lithium battery was lithium nickel manganese cobalt oxide (LiNi 0.5 Mn 0.3 Co 0.2 O 2 ) The negative electrode material is lithium, and the lithium is added at 60 DEG CAnd (3) performing a row charge and discharge test, wherein the measured charge capacity is 191mAh/g, the measured discharge capacity is 177mAh/g, the measured electrochemical window is larger than 4.5V, the charge and discharge are cycled for 100 times, and the capacity is kept above 95%. The battery is charged and discharged for 10 times under the high temperature condition of 300 ℃, the deformation or electrolyte leakage phenomenon of the battery does not occur, and the battery capacity is kept to be more than 85% when the temperature is 60 ℃. At 200℃for 10 4 And the impact stress of N is tested, so that no leakage occurs.
Example 9
An electrolyte material of lithium battery is prepared through adding 40g of 1-hexadecyl-3-methylimidazole nitrate ionic liquid into 1L beaker, stirring with magnetic stirrer, and adding 37g of LiPF at uniform speed 6 Stirring to a mutual dissolution state, adding 23g of GaN at a constant speed, stirring for 5 hours, performing ultrasonic treatment for 60 minutes, stirring for 5 hours after ultrasonic treatment is finished, and obtaining the electrolyte material, wherein the whole process is finished under the condition of isolating air, and preventing water in the air from being absorbed.
The electrolyte prepared in this example was tested for conductivity by AC impedance method, repeated 5 times and the average value was calculated, and the conductivity was measured to be 8.48X10 -3 S/cm. The electrolyte prepared in this example was put into a lithium battery system, and the positive electrode material used in the lithium battery was lithium nickel manganese cobalt oxide (LiNi 0.5 Mn 0.3 Co 0.2 O 2 ) The cathode material is lithium, and the charge and discharge test is carried out at 60 ℃, so that the charge capacity is 186mAh/g, the discharge capacity is 167mAh/g, the electrochemical window is larger than 4.5V, the charge and discharge are cycled for 100 times, and the capacity is kept above 95%. The battery is charged and discharged for 10 times under the high temperature condition of 300 ℃, the deformation or electrolyte leakage phenomenon of the battery does not occur, and the battery capacity is kept to be more than 85% when the temperature is 60 ℃. At 200℃for 10 4 And the impact stress of N is tested, so that no leakage occurs.
Example 10
This example is a comparative example, employing a conventional LiPF 6 As electrolyte material, divinyl carbonate (EC) plus dimethyl carbonate (DMC) were added. Comparison with the examples of the invention was made under the same conditions.
The electrolyte prepared in this example was tested for electricity by AC impedance methodConductivity was measured 2.25X10 conductivity by repeating the test 5 times and calculating the average value -3 S/cm. The electrolyte prepared in this example was put into a lithium battery system, and the positive electrode material used in the lithium battery was lithium nickel manganese cobalt oxide (LiNi 0.5 Mn 0.3 Co 0.2 O 2 ) The cathode material is lithium, and the charge and discharge test is carried out at 60 ℃, so that the charge capacity is 115mAh/g, the discharge capacity is 79mAh/g, the electrochemical window is smaller than 4.5V, the charge and discharge are cycled for 100 times, and the capacity is reduced to below 90%. And the battery is charged and discharged at 300 ℃, expands and deforms and explodes, and electrolyte leaks out. At 200℃for 10 4 N impact stress test, burst and electrolyte leakage occurred.
As can be seen by analysis, compared with the electrolyte in the prior art, the electrolyte product of the embodiment of the invention has higher conductivity than the traditional electrolyte, and the prepared battery has larger charge-discharge capacitance which reaches 180mAh/g, can resist high temperature of at least 300 ℃ and can resist 10 at least 200 DEG C 4 The impact stress of N is superior in performance, and the breakthrough progress in the aspect of high-temperature lithium battery electrolyte is achieved, so that the method has a great industrial production prospect.
The foregoing description of the embodiments of the present invention should not be taken as limiting the scope of the invention, but rather should be construed in view of the following detailed description.

Claims (5)

1. An electrolyte material for a lithium battery, characterized in that: the material comprises the following raw materials in parts by weight: 30-65 parts of ionic liquid, 5-35 parts of additive and 20-68 parts of lithium salt;
the additive is Ge 3 N 4 ；
The ionic liquid is 1-hexadecyl-3-methylimidazole nitrate;
the lithium salt is LiTFSI.
2. The electrolyte material for a lithium battery according to claim 1, wherein: the content of the ionic liquid is 35-45 parts.
3. The electrolyte material for a lithium battery according to claim 2, wherein: the content of the additive is 20-35 parts.
4. An electrolyte material for a lithium battery according to claim 3, wherein: the lithium salt content is 35-50 parts.
5. A high temperature lithium battery, wherein the electrolyte material is the electrolyte material of the lithium battery according to any one of claims 1 to 4.
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CN115498280A (en) * 2022-09-30 2022-12-20 北京理工大学 Alkali metal battery electrolyte additive, electrolyte and preparation method thereof

Citations (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1640931A (en) * 2004-01-16 2005-07-20 中国科学院化学研究所 Volatileness-free polymer electrolyte composition, its preparation method and use
CN101241774A (en) * 2007-02-09 2008-08-13 中国科学院物理研究所 A compound electrolyte material and its making method
CN102347475A (en) * 2010-07-27 2012-02-08 曾永斌 High-performance lithium ion battery and preparation process thereof
CN103000926A (en) * 2012-12-12 2013-03-27 大力电工襄阳股份有限公司 Electrolyte of vanadium battery
JP2013251091A (en) * 2012-05-31 2013-12-12 Nippon Synthetic Chem Ind Co Ltd:The Electrolyte and lithium secondary cell using the same
JP2014091796A (en) * 2012-11-06 2014-05-19 Mitsubishi Plastics Inc Coating liquid, laminated porous film, separator for nonaqueous electrolyte secondary battery, and nonaqueous electrolyte secondary battery
CN103858268A (en) * 2013-09-27 2014-06-11 惠州亿纬锂能股份有限公司 Lithium battery electrolyte and lithium battery using electrolyte
JP2016038967A (en) * 2014-08-06 2016-03-22 トヨタ自動車株式会社 Nonaqueous electrolyte secondary battery
CN105870453A (en) * 2016-05-26 2016-08-17 唐林 Electrolyte used for aluminum battery and preparation method thereof
CN106133984A (en) * 2014-03-28 2016-11-16 住友精化株式会社 Addition agent of non-aqueous electrolyte, nonaqueous electrolytic solution and electrical storage device
WO2016204820A2 (en) * 2015-01-27 2016-12-22 Fastcap Systems Corporation Wide temperature range ultracapacitor
CN106716702A (en) * 2014-09-26 2017-05-24 株式会社Lg 化学 Lithium-sulfur battery and battery module including same
CN107925055A (en) * 2015-05-20 2018-04-17 迪肯大学 Electro-chemical cell
CN108039512A (en) * 2017-11-27 2018-05-15 中南大学 A kind of lithium, sodium-ion battery fire retardant and its methods for making and using same
CN108539257A (en) * 2018-04-18 2018-09-14 广州天赐高新材料股份有限公司 Lithium secondary cell electrolyte and its lithium secondary battery
CN109070049A (en) * 2016-03-04 2018-12-21 康奈尔大学 Stable room temperature sodium-sulfur battery

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB201009519D0 (en) * 2010-06-07 2010-07-21 Nexeon Ltd An additive for lithium ion rechargeable battery cells
US8697291B2 (en) * 2010-10-07 2014-04-15 Uchicago Argonne, Llc Non-aqueous electrolyte for lithium-ion battery
US9300009B2 (en) * 2012-10-22 2016-03-29 Ut-Battelle, Llc Electrolyte compositions for lithium ion batteries
JP2015090777A (en) * 2013-11-05 2015-05-11 ソニー株式会社 Battery, electrolyte, battery pack, electronic device, electric motor vehicle, power storage device and electric power system
US9698447B2 (en) * 2013-11-18 2017-07-04 Basf Corporation Use of lithium bis(fluorosulfonyl) imide (LiFSI) in non-aqueous electrolyte solutions for use with 4.2v and higher cathode materials for lithium ion batteries
HUE064081T2 (en) * 2014-08-28 2024-02-28 Samsung Electronics Co Ltd Composite electrolyte and lithium battery including the same
CN107743659B (en) * 2015-01-30 2021-01-26 科罗拉多州立大学董事会（法人团体） Ionic liquid type high-energy lithium ion battery
US10312551B2 (en) * 2015-09-11 2019-06-04 Microvast Power Systems Co., Ltd. Preparation method of ionic liquids and secondary batteries

Patent Citations (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1640931A (en) * 2004-01-16 2005-07-20 中国科学院化学研究所 Volatileness-free polymer electrolyte composition, its preparation method and use
CN101241774A (en) * 2007-02-09 2008-08-13 中国科学院物理研究所 A compound electrolyte material and its making method
CN102347475A (en) * 2010-07-27 2012-02-08 曾永斌 High-performance lithium ion battery and preparation process thereof
JP2013251091A (en) * 2012-05-31 2013-12-12 Nippon Synthetic Chem Ind Co Ltd:The Electrolyte and lithium secondary cell using the same
JP2014091796A (en) * 2012-11-06 2014-05-19 Mitsubishi Plastics Inc Coating liquid, laminated porous film, separator for nonaqueous electrolyte secondary battery, and nonaqueous electrolyte secondary battery
CN103000926A (en) * 2012-12-12 2013-03-27 大力电工襄阳股份有限公司 Electrolyte of vanadium battery
CN103858268A (en) * 2013-09-27 2014-06-11 惠州亿纬锂能股份有限公司 Lithium battery electrolyte and lithium battery using electrolyte
CN106133984A (en) * 2014-03-28 2016-11-16 住友精化株式会社 Addition agent of non-aqueous electrolyte, nonaqueous electrolytic solution and electrical storage device
JP2016038967A (en) * 2014-08-06 2016-03-22 トヨタ自動車株式会社 Nonaqueous electrolyte secondary battery
CN106716702A (en) * 2014-09-26 2017-05-24 株式会社Lg 化学 Lithium-sulfur battery and battery module including same
WO2016204820A2 (en) * 2015-01-27 2016-12-22 Fastcap Systems Corporation Wide temperature range ultracapacitor
CN107925055A (en) * 2015-05-20 2018-04-17 迪肯大学 Electro-chemical cell
CN109070049A (en) * 2016-03-04 2018-12-21 康奈尔大学 Stable room temperature sodium-sulfur battery
CN105870453A (en) * 2016-05-26 2016-08-17 唐林 Electrolyte used for aluminum battery and preparation method thereof
CN108039512A (en) * 2017-11-27 2018-05-15 中南大学 A kind of lithium, sodium-ion battery fire retardant and its methods for making and using same
CN108539257A (en) * 2018-04-18 2018-09-14 广州天赐高新材料股份有限公司 Lithium secondary cell electrolyte and its lithium secondary battery

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