CN106298273A - A kind of high-octane aquo-lithium ion type fluid capacitor anode and cathode slurry formula - Google Patents

Abstract

The invention provides a kind of high-octane aquo-lithium ion type fluid capacitor anode and cathode slurry formula, it includes anode sizing agent and cathode size；Described anode sizing agent is formulated by lithium ion battery material, conductive agent and Aqueous Lithium Salts；Described cathode size is formulated by porous carbon materials, conductive agent and Aqueous Lithium Salts.The present invention is by have employed the lithium ion battery material raw material as slurry so that the specific capacity of water system fluid capacitor is significantly improved；Particular, it is important that the present invention is by using asymmetrical fluid electrode configuration, the most different positive and negative electrode slurries, make the running voltage of device up to 1.8V so that this water system fluid capacitor specific energy is much higher than existing water system fluid capacitor.

Description

A high-energy aqueous lithium-ion fluid capacitor positive and negative slurry formulation

technical field

The invention relates to the technical field of electrochemical batteries, in particular to a water-based lithium-ion fluid capacitor and a high-energy water-based lithium-ion fluid capacitor positive and negative slurry formulation.

Background technique

In recent years, with the rapid growth of installed capacity of clean energy such as solar energy and wind energy, the research and development of technologies and devices suitable for large-scale energy storage has become increasingly important. Electrochemical batteries have attracted extensive attention due to their high energy density and no special requirements for geographical conditions. Among them, the liquid flow battery is an important representative of this type of battery. Worldwide, flow battery storage power stations with energy storage capacity of several megawatts to tens of megawatts have been built in many countries, and are gradually entering into commercialization (Soloveichik2015).

As shown in Figure 1, traditional flow batteries use liquids with oxidation/reduction capabilities (such as all-alumina electrolytes) as energy storage materials, and these liquids are stored in external large storage tanks. During the operation of the battery, the liquid in the anode and cathode storage tanks are pumped into the working chamber for oxidation or reduction reaction to realize the charging or discharging process of the battery, so as to achieve the purpose of energy storage. The structure of the flow battery is very simple.

More importantly, the total capacity of this type of battery depends on the volume of the external storage tank, while the power depends on the area of the working electrode in the working chamber and the characteristics of the active material in the electrolyte. Since the energy storage chamber and the working chamber are separated, the total capacity and power of the flow battery can be adjusted independently, which has great flexibility and adaptability in applications.

However, the slow charging (several hours) and limited service life (typically less than 20,000 cycles) of traditional flow batteries limit its application in occasions that require fast response, such as grid peak shaving (Presser, Dennison et al. 2012).

On the other hand, supercapacitors have extremely fast charging and discharging capabilities and long life, and are especially suitable for occasions that require fast charging and discharging. Therefore, some researchers have proposed to combine supercapacitors with traditional flow batteries, that is, to mix supercapacitor materials such as activated carbon and electrolytes into a flowable slurry, and combine the simple configuration of flow batteries to obtain a new type of semi-conductor. Solid fluid capacitors (Hatzell, Boota et al. 2015). The first-generation fluid capacitors used mesoporous carbon spheres and a safe, low-cost aqueous electrolyte to make the slurry, and the resulting fluid capacitors showed high power density, but the energy density was limited by the relatively low density of mesoporous carbon spheres. Low specific capacitance (~90F/g) and low working voltage (~0.6V) of aqueous electrolyte (Presser, Dennison et al. 2012).

Since then, researchers have been trying to use new methods to increase the energy density of aqueous fluid capacitors. For example, adding soluble oxidation/reduction substances (such as soluble organic molecules) to aqueous electrolytes (Boota, Hatzell et al. 2015) to increase capacitance or using asymmetric electrodes to increase the working voltage of aqueous electrolytes (Huang, Zhanget al. 2014). Through these methods, the energy density of fluid capacitors is increased by about 1.5-3 times. For example, when the power density is ~50-100W/kg, the energy density can reach 11-14Wh/kg, but the energy density still cannot meet the needs of the application. Therefore, how to design and prepare a fluid capacitor with higher energy density becomes an important issue, and its energy density mainly depends on the characteristics of the materials used in the positive and negative slurry.

Contents of the invention

The purpose of the present invention is to provide a fluid capacitor and its high-energy aqueous lithium-ion type fluid capacitor positive and negative slurry formulations to solve the technical problem of low energy density of fluid capacitors in the prior art. Compared with the existing water-based fluid capacitors, the fluid capacitor slurry of the present invention has higher energy density while maintaining higher power density and cycle life.

In order to solve the above-mentioned technical problems, the present invention provides a high-energy water-based lithium ion fluid capacitor positive and negative slurry formulation, which includes a positive electrode slurry and a negative electrode slurry;

The positive electrode slurry is prepared from lithium ion battery material, conductive agent and lithium salt solution;

The negative electrode slurry is prepared from porous carbon material, conductive agent and lithium salt solution.

In the present invention, the specific capacity of the fluid capacitor is significantly improved by using the lithium-ion battery material as the raw material of the slurry; more importantly, the present invention adopts an asymmetric fluid electrode configuration, that is, different positive and negative electrode slurries , so that the operating voltage of the device can reach 1.8V, so that the specific energy of the water system fluid capacitor is much higher than that of the existing water system fluid capacitor.

Further, the lithium ion battery material is one or a mixture of spinel lithium manganese oxide, lithium cobalt oxide, lithium iron phosphate and ternary lithium battery materials.

Further, the ternary lithium battery material includes a nickel-cobalt-manganese ternary lithium battery material or a nickel-cobalt-aluminum ternary lithium battery material.

Further, the conductive agent is one or a mixture of Ketjen black, acetylene black, carbon black, carbon nanotubes, graphene and reduced graphene oxide.

Further, the lithium salt is one or a combination of lithium sulfate, lithium nitrate and lithium chloride.

Further, the porous carbon material is one or a mixture of activated carbon, mesoporous carbon spheres or particles.

Further, the lithium-ion battery material accounts for 1-80% by mass in the positive electrode slurry.

Further, the mass percentage of the porous carbon material in the negative electrode slurry is 1-80%.

Further, the mass percentage of the conductive agent in the positive electrode slurry or the negative electrode slurry is 0.1-30%.

Further, the concentration of the lithium salt solution is 0.2-3 mol/L.

The invention also discloses a fluid capacitor using the positive and negative electrode slurry.

A fluid capacitor comprising an undischarged positive storage tank, a discharged positive storage tank, a reaction chamber, an undischarged negative storage tank, a discharged negative storage tank, and a slurry conveying device,

The reaction chamber includes a positive electrode chamber and a negative electrode chamber;

The undischarged positive electrode storage tank communicates with the discharged positive electrode storage tank through pipelines and the positive electrode chamber;

The undischarged negative electrode storage tank communicates with the discharged negative electrode storage tank through the pipeline and the negative electrode chamber;

The positive electrode slurry is stored in the undischarged positive electrode storage tank and the discharged positive electrode storage tank;

Negative electrode slurry is stored in the undischarged negative electrode storage tank and the discharged negative electrode storage tank;

The slurry delivery device includes a positive electrode slurry delivery device and a negative electrode slurry delivery device,

The positive electrode slurry conveying device is used to transport the positive electrode slurry between the undischarged positive electrode storage tank and the discharged positive electrode storage tank;

The negative electrode slurry conveying device is used for conveying the negative electrode slurry between the undischarged negative electrode storage tank and the discharged negative electrode storage tank;

During the conveying process, the positive electrode slurry and the negative electrode slurry pass through the positive electrode chamber and the negative electrode chamber respectively;

The negative electrode slurry and the positive electrode slurry are made of different raw materials.

Further, the positive electrode chamber and the negative electrode chamber are symmetrically arranged left and right, and a diaphragm is arranged between them.

Further, the positive electrode chamber includes an outer protective plate, a conductive current collector, and a grooved insulating sheet arranged in sequence from left to right;

The negative electrode chamber includes an insulating sheet with grooves, a conductive current collector and an outer protective plate arranged in sequence from left to right.

Further, the diaphragm is a polypropylene diaphragm, a cellulose diaphragm or a ceramic diaphragm.

More preferably, the membrane is polypropylene celgard 3500 membrane.

Further, the conductive current collector is made of carbon-based materials such as metal plates such as stainless steel, graphite plates, and carbon nanotube paper.

Further, the grooved insulating sheet is polytetrafluoroethylene, polyethylene or rubber sheet.

Further, the thickness of the grooved insulating sheet is 0.2-10mm.

Further, the slurry conveying device is a propeller or a peristaltic pump.

Adopt above-mentioned technical scheme, the present invention has following beneficial effect:

1. The lithium-ion battery material is used as the raw material of the slurry, which significantly improves the specific capacity of the positive electrode slurry;

2. The asymmetric fluid electrode configuration is adopted, so that the working voltage of the device can reach 1.8V;

3. The energy density of the lithium ion fluid capacitor using the positive and negative electrode slurry is much higher than that of the existing water system fluid capacitor. For example, when the power density is about 50W/kg, the energy density reaches 23.4Wh/kg, which is about twice the highest energy density of the reported aqueous fluid capacitor.

Description of drawings

In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings that need to be used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the accompanying drawings in the following description These are some implementations of the present invention. For those skilled in the art, other drawings can also be obtained according to these drawings without creative work.

FIG. 1 is a schematic structural diagram of a flow battery in the prior art;

FIG. 2 is a schematic structural diagram of a fluid capacitor provided in Embodiment 2 of the present invention;

3 is a schematic structural view of the reaction chamber in the fluid capacitor provided by Embodiment 2 of the present invention;

Fig. 4 is an exploded schematic view of the reaction chamber in the fluid capacitor provided by Embodiment 2 of the present invention;

5 is a scanning electron microscope picture of L10K4 positive electrode slurry in Example 3 of the present invention;

6 is a scanning electron microscope picture of A20K2 negative electrode slurry in Example 3 of the present invention;

7 is a charge-discharge curve diagram of L10K4/A20K2 lithium-ion fluid capacitors under different current density conditions in Example 3 of the present invention;

Fig. 8 is the specific capacitance and specific energy figure of L10K4/A20K2 lithium-ion type fluid capacitor in the embodiment 3 of the present invention;

Fig. 9 is a diagram of the specific capacitance and specific energy of the L10K2.5/A20K2 lithium-ion fluid capacitor under different current densities in Example 4 of the present invention.

Reference signs:

10-undischarged positive electrode storage tank; 20-discharged positive electrode storage tank;

30-undischarged negative electrode storage tank; 40-discharged negative electrode storage tank;

50-positive electrode slurry delivery device; 60-negative electrode slurry delivery device;

70-reaction chamber; 70a-positive electrode chamber;

70b-negative electrode chamber; 71-diaphragm;

72-outer protective plate; 73-conductive current collector;

74 - grooved insulating sheet.

detailed description

The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, or in a specific orientation. construction and operation, therefore, should not be construed as limiting the invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and should not be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.

The present invention will be further explained below in combination with specific embodiments.

Example 1

A high-energy water-based lithium ion fluid capacitor positive and negative slurry formulation provided in this embodiment, which includes a positive electrode slurry and a negative electrode slurry;

The positive electrode slurry is prepared from lithium ion battery materials, conductive agent and lithium salt solution;

The negative electrode slurry is prepared from porous carbon material, conductive agent and lithium salt solution.

In the present invention, the specific capacity of the fluid capacitor is significantly improved by using the lithium-ion battery material as the raw material of the slurry; more importantly, the present invention adopts an asymmetric fluid electrode configuration, that is, different positive and negative electrode slurries , so that the operating voltage of the device can reach 1.8V.

The lithium-ion battery material is one or a mixture of spinel lithium manganese oxide, lithium cobalt oxide, lithium iron phosphate and ternary lithium battery materials.

Ternary lithium battery materials include nickel-cobalt-manganese ternary lithium battery materials or nickel-cobalt-aluminum ternary lithium battery materials.

The conductive agent is one or a mixture of Ketjen black, acetylene black, carbon black, carbon nanotubes, graphene and reduced graphene oxide.

The lithium salt is one or a combination of lithium sulfate, lithium nitrate and lithium chloride.

The porous carbon material is one or a mixture of activated carbon, mesoporous carbon spheres or particles.

The mass percentage of the lithium ion battery material in the positive electrode slurry is 1-80%.

The mass percentage of the porous carbon material in the negative electrode slurry is 1-80%.

The mass percentage of the conductive agent in the positive electrode slurry or the negative electrode slurry is 0.1-30%.

The concentration of lithium salt solution is 0.2-3mol/L.

The present invention adopts lithium-ion battery material as the raw material of the slurry, so that the specific capacity of the fluid capacitor is significantly improved; in addition, by adopting an asymmetric fluid electrode configuration, the working voltage of the device can reach 1.8V, which is beneficial to the ratio energy boost.

Example 2

As shown in Figures 2-4, the present invention also discloses a fluid capacitor, which includes an undischarged positive storage tank 10, a discharged positive storage tank 20, a reaction chamber 70, an undischarged negative storage tank 30, and a discharged negative storage tank 40 and slurry conveying device,

The reaction chamber 70 includes a positive electrode chamber 70a and a negative electrode chamber 70b;

The undischarged positive electrode storage tank 10 communicates with the discharged positive electrode storage tank 20 through the pipeline and the positive electrode chamber 70a;

The undischarged negative electrode storage tank 30 communicates with the discharged negative electrode storage tank 40 through the pipeline and the negative electrode chamber 70b;

The positive electrode slurry is stored in the undischarged positive electrode storage tank 10 and the discharged positive electrode storage tank 20;

Negative electrode slurry is stored in the undischarged negative electrode storage tank 30 and the discharged negative electrode storage tank 40;

The slurry delivery device includes a positive electrode slurry delivery device 50 and a negative electrode slurry delivery device 60, and the slurry delivery device is preferably a propeller or a peristaltic pump.

The positive electrode slurry delivery device 50 is used to transport the positive electrode slurry between the undischarged positive electrode storage tank 10 and the discharged positive electrode storage tank 20;

The negative electrode slurry conveying device 60 is used for conveying the negative electrode slurry between the undischarged negative electrode storage tank 30 and the discharged negative electrode storage tank 40;

During the conveying process, the positive electrode slurry and the negative electrode slurry pass through the positive electrode chamber 70a and the negative electrode chamber 70b respectively synchronously;

The negative electrode slurry and the positive electrode slurry are made of different raw materials.

The positive electrode chamber 70a and the negative electrode chamber 70b are symmetrically arranged left and right, and a diaphragm 71 is arranged between them.

The positive electrode chamber 70a includes an outer protective plate 72, a conductive current collector 73, and a grooved insulating sheet 74 arranged in sequence from left to right;

The negative electrode chamber 70b includes a grooved insulating sheet 74 , a conductive current collector 73 and an outer protective plate 72 arranged in sequence from left to right.

The diaphragm 71 is a polypropylene diaphragm, a cellulose diaphragm or a ceramic diaphragm. More preferably, the membrane is a polypropylene celgard 3500 membrane.

The conductive current collector 73 is made of carbon-based materials such as metal plates such as stainless steel, graphite plates, and carbon nanotube paper.

The grooved insulating sheet 74 is polytetrafluoroethylene, polyethylene or rubber sheet.

The thickness of the grooved insulating sheet 74 is 0.2-10mm.

The energy density of the lithium ion fluid capacitor in this embodiment is much higher than that of the existing water system fluid capacitor. For example, when the power density is about 50W/kg, the energy density reaches 23.4Wh/kg, which is about twice the highest energy density of the reported aqueous fluid capacitor.

Example 3

This embodiment is basically the same as Embodiment 1, the difference is:

In the preparation of positive electrode slurry, weigh 1.23g of commercial lithium manganese oxide (LiMn ₂ O ₄ ) powder and 0.49g of Ketjen black powder, grind them evenly and add 10ml of lithium sulfate aqueous solution with a concentration of 1mol/L. The above mixture was first stirred with a magnetic stirrer for 1 hour, and then put into an ultrasonic instrument (power 800W) for ultrasonic oscillation for 30 minutes. The above mixing process is repeated twice, and finally the materials and solutions are uniformly mixed and dispersed. In the slurry prepared by the above method, LiMn ₂ O ₄ accounts for 10 wt%, and Ketjen Black accounts for 4 wt%. This slurry was labeled L10K4.

Wherein, Fig. 5 is a scanning electron microscope picture of the slurry.

In the preparation of the negative electrode slurry, weigh 2.72g of activated carbon powder and 0.22g of Ketjen black powder, grind them evenly, and add 10ml of lithium sulfate aqueous solution with a concentration of 1mol/L. The above mixture was first stirred with a magnetic stirrer for 1 hour, and then put into an ultrasonic instrument (power 800W) for ultrasonic oscillation for 30 minutes. The above mixing process is repeated twice, and finally the materials and solutions are uniformly mixed and dispersed. In the slurry prepared by the above method, activated carbon accounts for 20 wt%, and Ketjen black accounts for 2 wt%. The paste was labeled A10K2. Figure 6 is a scanning electron microscope picture of the slurry.

Inject the above-mentioned positive electrode and negative electrode slurry into two relatively separated positive electrode chambers and negative electrode chambers of the reaction chamber at the same time (the size of the positive and negative electrode chambers: length 4cm, width 0.5cm, height 0.09cm, diaphragm is polypropylene microporous membrane celgrad 3500) Inside, an asymmetric lithium-ion fluid capacitor is formed, namely the L10K4/A20K2 lithium-ion fluid capacitor.

Fig. 7 is the charging and discharging voltage curve of the fluid capacitor under different current density conditions in the voltage range of 0-1.8V; Fig. 8 is its corresponding specific capacitance and energy density. Under the condition of charge and discharge current density of 2.5mA/cm ² (corresponding to power density of 50Wh/kg), the specific capacitance of the lithium-ion fluid capacitor is 52F/g, and the energy density is 23.4Wh/kg (using positive and negative electrode slurry The mass of active material in the material is calculated); when the current density increases to 15mA/cm ² (power density 490.9W/kg), the device still maintains a high energy density, reaching 9.6Wh/kg.

Obtained from the test that the present invention has outstanding positive technical effects compared with the prior art.

Example 4

This embodiment is basically the same as Embodiment 1, the difference is:

In the preparation of positive electrode slurry, weigh 1.21g of commercial LiMn ₂ O ₄ powder and 0.30g of Ketjen Black powder, grind them evenly, and add 10ml of lithium sulfate solution with a concentration of 1mol/L. The above mixture was first stirred with a magnetic stirrer for 1 hour, and then put into an ultrasonic instrument (power 800W) for ultrasonic oscillation for 30 minutes. The above mixing process is repeated twice, and finally the materials and solutions are uniformly mixed and dispersed. In the slurry prepared by the above method, LiMn ₂ O ₄ accounts for 10 wt%, and Ketjen black accounts for 2.5 wt%. This slurry is labeled L10K2.5.

In the preparation of the negative electrode slurry, weigh 2.72g of activated carbon powder and 0.22g of Ketjen black powder, grind them evenly, and add 10ml of lithium sulfate solution with a concentration of 1mol/L. The above mixture was first stirred with a magnetic stirrer for 1 hour, and then put into an ultrasonic instrument (power 800W) for ultrasonic oscillation for 30 minutes. The above mixing process is repeated twice, and finally the materials and solutions are uniformly mixed and dispersed. In the slurry prepared by the above method, activated carbon accounts for 20 wt%, and Ketjen black accounts for 2 wt%. The paste was labeled A10K2.

In order to further demonstrate the beneficial effect of adopting this kind of slurry, the positive electrode and the negative electrode slurry are simultaneously injected into two relatively separated positive and negative electrode chambers of the reaction chamber (cavity size: length 4cm, width 0.5cm, height 0.09cm, diaphragm: The asymmetric L10K2.5/A10K2 lithium ion fluid capacitor is formed in the polypropylene microporous membrane celgrad 3500).

FIG. 9 shows the specific capacitance and corresponding energy density of this embodiment. Under the condition of charge and discharge current density of 2.5mA/cm ² (corresponding power density of 47Wh/kg), the specific capacitance of the lithium ion fluid capacitor is 49.6F/g, and the energy density is 21.9Wh/kg.

This embodiment also proves that the present invention has outstanding positive technical effects compared with the prior art.

Example 5

This embodiment is basically the same as Embodiment 1, except that carbon nanotubes are used as the conductive agent, specifically:

Preparation of positive electrode slurry: Weigh 1.21g of commercial LiMn ₂ O ₄ powder and 0.30g of carbon nanotube powder respectively, grind them evenly and add 10ml of lithium sulfate solution with a concentration of 1mol/L. The above mixture was first stirred with a magnetic stirrer for 1 hour, and then put into an ultrasonic instrument (power 800W) for ultrasonic oscillation for 30 minutes. The above mixing process was repeated twice, and finally the materials and solutions were uniformly mixed and dispersed to obtain the positive electrode slurry.

Preparation of negative electrode slurry: Weigh 2.72g of activated carbon powder and 0.22g of carbon nanotube powder respectively, grind them evenly and add 10ml of lithium sulfate solution with a concentration of 1mol/L. The above mixture was first stirred with a magnetic stirrer for 1 hour, and then put into an ultrasonic instrument (power 800W) for ultrasonic oscillation for 30 minutes. The above mixing process is repeated twice, and finally the materials and solutions are uniformly mixed and dispersed to obtain negative electrode slurry.

Inject the above-mentioned positive and negative electrode slurries into two separate chambers of the reaction chamber at the same time (cavity size: length 4cm, width 0.5cm, height 0.09cm, diaphragm is polypropylene microporous membrane celgrad 3500) to form an asymmetric lithium ion fluid capacitor. With the help of the excellent electrical conductivity of carbon nanotubes, the power density of the fluid capacitor is improved and a high energy density is maintained.

Example 6

This example is basically the same as Example 1, except that lithium cobaltate is used as the raw material of the positive electrode slurry, specifically:

Positive electrode slurry production: Weigh 1.21g of commercial lithium cobaltate (LiCoO ₂ ) powder and 0.30g of carbon nanotube powder respectively, grind them evenly and add 10ml of lithium sulfate solution with a concentration of 1mol/L. The above mixture was first stirred with a magnetic stirrer for 1 hour, and then put into an ultrasonic instrument (power 800W) for ultrasonic oscillation for 30 minutes. The above mixing process was repeated twice, and finally the materials and solutions were uniformly mixed and dispersed to obtain the positive electrode slurry.

Preparation of negative electrode slurry: Weigh 2.72g of activated carbon powder and 0.22g of carbon nanotube powder respectively, grind them evenly and add 10ml of lithium sulfate solution with a concentration of 1mol/L. The above mixture was first stirred with a magnetic stirrer for 1 hour, and then put into an ultrasonic instrument (power 800W) for ultrasonic oscillation for 30 minutes. The above mixing process is repeated twice, and finally the materials and solutions are uniformly mixed and dispersed to obtain the negative electrode slurry.

Inject the above-mentioned positive and negative electrode slurries into two separate chambers of the reaction chamber at the same time (cavity size: length 4cm, width 0.5cm, height 0.09cm, diaphragm is polypropylene microporous membrane celgrad 3500) to form an asymmetric lithium ion fluid capacitor. The aqueous fluidic capacitor has high energy density while maintaining high power density due to the use of layered _LiCoO2 material.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: It is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the various embodiments of the present invention. scope.

Claims (10)

1. A high-energy water system lithium-ion type fluid capacitor positive and negative slurry formulation, characterized in that it includes positive slurry and negative slurry; The positive electrode slurry is prepared from lithium ion battery material, conductive agent and lithium salt solution; The negative electrode slurry is prepared from porous carbon material, conductive agent and lithium salt solution. 2. the high-energy water system lithium ion type fluid capacitor positive and negative slurry formula according to claim 1, is characterized in that, described lithium ion battery material is spinel lithium manganese oxide, lithium cobaltate, lithium iron phosphate Mix with one or more of the ternary lithium battery materials. 3. The high-energy water-based lithium ion fluid capacitor positive and negative slurry formula according to claim 2, wherein the ternary lithium battery material comprises nickel-cobalt-manganese ternary lithium battery material or nickel-cobalt-aluminum ternary lithium battery material Material. 4. The high-energy water-based lithium ion fluid capacitor positive and negative slurry formula according to claim 1, wherein the conductive agent is Ketjen black, acetylene black, carbon black, carbon nanotubes, graphene and a mixture of one or more of the reduced graphene oxide. 5. The high-energy water-based lithium ion fluid capacitor positive and negative slurry formula according to claim 1, wherein the lithium salt is one or more of lithium sulfate, lithium nitrate, and lithium chloride Compositions. 6. The high-energy water-based lithium ion fluid capacitor positive and negative slurry formula according to claim 1, wherein the porous carbon material is one or more of activated carbon, mesoporous carbon spheres or particles of mixed materials. 7. The high-energy water-based lithium ion fluid capacitor positive and negative slurry formulation according to claim 1, characterized in that the lithium ion battery material accounts for 1 to 80% by mass in the positive electrode slurry %. 8. The high-energy water-based lithium ion fluid capacitor positive and negative slurry formulation according to claim 1, wherein the porous carbon material accounts for 1 to 80% by mass in the negative electrode slurry . 9. The high-energy water-based lithium-ion fluid capacitor positive and negative slurry formula according to claim 1, characterized in that, the mass percentage of the conductive agent in the positive electrode slurry or the negative electrode slurry is 0.1-30 %. 10. The high-energy water-based lithium ion fluid capacitor positive and negative slurry formulation according to claim 1, characterized in that the concentration of the lithium salt solution is 0.2-3mol/L.