CN115275316A - Solid-state lithium ion battery containing composite electrolyte diaphragm - Google Patents
Solid-state lithium ion battery containing composite electrolyte diaphragm Download PDFInfo
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- CN115275316A CN115275316A CN202210800892.8A CN202210800892A CN115275316A CN 115275316 A CN115275316 A CN 115275316A CN 202210800892 A CN202210800892 A CN 202210800892A CN 115275316 A CN115275316 A CN 115275316A
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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
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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
- H01M10/056—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
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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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/409—Separators, membranes or diaphragms characterised by the material
- H01M50/446—Composite material consisting of a mixture of organic and inorganic materials
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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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/409—Separators, membranes or diaphragms characterised by the material
- H01M50/449—Separators, membranes or diaphragms characterised by the material having a layered structure
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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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/409—Separators, membranes or diaphragms characterised by the material
- H01M50/449—Separators, membranes or diaphragms characterised by the material having a layered structure
- H01M50/451—Separators, membranes or diaphragms characterised by the material having a layered structure comprising layers of only organic material and layers containing inorganic material
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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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/489—Separators, membranes, diaphragms or spacing elements inside the cells, characterised by their physical properties, e.g. swelling degree, hydrophilicity or shut down properties
- H01M50/491—Porosity
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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
- H01M2300/00—Electrolytes
- H01M2300/0017—Non-aqueous electrolytes
- H01M2300/0025—Organic electrolyte
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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
- H01M2300/00—Electrolytes
- H01M2300/0017—Non-aqueous electrolytes
- H01M2300/0065—Solid electrolytes
- H01M2300/0068—Solid electrolytes inorganic
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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
- H01M2300/00—Electrolytes
- H01M2300/0085—Immobilising or gelification of electrolyte
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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
- H01M2300/00—Electrolytes
- H01M2300/0088—Composites
- H01M2300/0091—Composites in the form of mixtures
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- 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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Abstract
The invention provides a solid lithium ion battery containing a composite electrolyte diaphragm, which comprises: the battery comprises a battery anode, a battery cathode and a composite electrolyte diaphragm arranged between the battery anode and the battery cathode, wherein the composite electrolyte diaphragm comprises a diaphragm substrate and a polymer coating, the polymer coating is coated on the surface of the diaphragm substrate, the surface of the polymer coating is provided with a hole structure which is communicated with each other, and a solid inorganic lithium ion conductor and a liquid electrolyte are filled in the hole structure. Has the beneficial effects that: universal jointBy arranging the solid inorganic lithium ion conductor and the liquid electrolyte in a pore structure that communicates with each other, the contact resistance between the particles of the solid inorganic lithium ion conductor can be reduced regardless of the amount of the solvent of the liquid electrolyte or the amount of the conductive salt solution (particularly LiPF)6) Can be effectively reduced, thereby not only reducing the ignition risk of igniting liquid or gas, but also reducing the ignition risk caused by LiPF6The reaction with moisture to form Hydrogen Fluoride (HF).
Description
Technical Field
The invention relates to the technical field of lithium ion batteries, in particular to a solid-state lithium ion battery containing a composite electrolyte diaphragm.
Background
Lithium ion batteries operate primarily by virtue of lithium ions (Li +) moving between a positive electrode and a negative electrode through an electrolyte, typically comprising lithium hexafluorophosphate-as a lithium conducting salt. In the process of charging and discharging, li + is inserted and extracted back and forth between the two electrodes; during charging, li + is extracted from the positive electrode and is inserted into the negative electrode through the electrolyte, and the negative electrode is in a lithium-rich state; the opposite is true for discharge.
Lithium ion batteries are typically protected by hermetic seals so that in normal operation, no spillage or ingress of external components occurs. However, when the lithium battery is subjected to external force, there are many problems: on one hand, the lithium battery shell can be damaged due to the action of mechanical force, so that the electrolyte leaks, is very dangerous, can release harmful gas, has low lightning and can start to burn at a lower temperature; on the other hand, the deformation of the battery under the mechanical action may also aggravate the electrochemical reaction inside the battery cell, which not only may cause the temperature to rise suddenly, but also may start to release active oxygen and a series of gases, causing the safety accident of the battery cell.
When the lithium battery case is mechanically damaged, or an accident involving an electric vehicle occurs, the contents may appear in the form of vapor, gas, or liquid. For example, vaporized electrolyte (which is a risk of explosion) and electrolyte decomposition products can be in gaseous form, such as methane, ethane, hydrogen, propane and butane, and aldehydes; the liquid electrolyte is present in liquid form and consists of a solvent, which is generally flammable and toxic, and a conductive salt solution (LiPF) when it comes into contact with moisture6) Highly toxic Hydrogen Fluoride (HF) is formed.
Disclosure of Invention
In order to solve the technical problems, the invention provides a solid-state lithium ion battery containing a composite electrolyte diaphragm.
The technical problem solved by the invention can be realized by adopting the following technical scheme:
a solid state lithium ion battery comprising a composite electrolyte separator, comprising:
a battery positive electrode including a positive electrode active material layer;
a battery anode comprising an anode active material layer, a binder;
the composite electrolyte diaphragm is arranged between the battery anode and the battery cathode and comprises a diaphragm substrate and a polymer coating, the polymer coating is coated on the surface of the diaphragm substrate, the surface of the polymer coating is provided with a hole structure which is communicated with each other, and a solid inorganic lithium ion conductor and a liquid electrolyte are filled in the hole structure.
Preferably, the hole structure comprises a first micropore with a first preset hole diameter and a second micropore with a second preset hole diameter;
the proportion of the second micropores in the pore structure is greater than or equal to 70%.
Preferably, the first preset aperture is 5um;
the second preset aperture is 1 um-2 um.
Preferably, the proportion of the pore structure in the polymer coating is greater than or equal to 85%.
Preferably, the diaphragm substrate includes a polymer including at least any one of polyester, polyethylene terephthalate, polyolefin, polyethylene, polypropylene, polyacrylonitrile, polyvinylidene fluoride, polyetherimide, polyimide, polyamide, polyether, and polyether ketone.
Preferably, the polymer coating layer includes at least any one of olefin, polyester and polyether polymer electrolyte coating layers.
Preferably, the solid inorganic lithium ion conductor is a crystalline electrolyte;
the crystalline electrolyte includes at least any one of perovskite type, NASICON type, LISICON type, or garnet type solid electrolytes.
Preferably, the solid inorganic lithium ion conductor consists of particles;
the particle diameter D50 of the particles is 0.05-5 mu m.
Preferably, the solid inorganic lithium ion conductor is 10 to 50 weight percent.
Preferably, the solid inorganic lithium ion conductor has an ionic conductivity of greater than 10-4s/cm。
The technical scheme of the invention has the advantages or beneficial effects that:
the present invention can reduce the contact resistance between particles of the solid inorganic lithium ion conductor, whether the amount of the solvent of the liquid electrolyte or the amount of the conductive salt solution (particularly LiPF), by arranging the solid inorganic lithium ion conductor and the liquid electrolyte in the pore structure communicating with each other6) Can be effectively reduced, thereby not only reducing the ignition risk of igniting liquid or gas, but also reducing the ignition risk caused by LiPF6The reaction with moisture to form Hydrogen Fluoride (HF) is harmful.
Drawings
Fig. 1 is a schematic structural diagram of a solid-state lithium ion battery containing a composite electrolyte membrane according to a preferred embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The invention is further described with reference to the following drawings and specific examples, which are not intended to be limiting.
In a preferred embodiment of the present invention, based on the above problems in the prior art, there is provided a solid-state lithium ion battery with a composite electrolyte membrane, which belongs to the technical field of lithium ion batteries, and as shown in fig. 1, includes:
a battery positive electrode 1, the battery positive electrode 1 including a positive electrode active material layer;
a battery negative electrode 3, the battery negative electrode 3 including a negative electrode active material layer, a binder;
the composite electrolyte membrane 2 is arranged between the battery anode 1 and the battery cathode 3, the composite electrolyte membrane 2 comprises a membrane substrate and a polymer coating, the polymer coating is coated on the surface of the membrane substrate, the polymer coating is arranged on the membrane substrate, the surface of the polymer coating is provided with a hole structure which is communicated with each other, and a solid inorganic lithium ion conductor and a liquid electrolyte are filled in the hole structure.
Specifically, in the solid-state lithium ion battery including the composite electrolyte membrane 2 according to the embodiment of the present invention, the membrane substrate has interconnected pore structures, and the pore structures include the solid inorganic lithium ion conductor and the liquid electrolyte. By arranging the solid inorganic lithium ion conductor and the liquid electrolyte in the interconnected pore structure, the contact resistance between the particles of the solid inorganic lithium ion conductor can be reduced, regardless of the amount of solvent of the liquid electrolyte or the amount of conductive salt solution (particularly LiPF)6) Can be effectively reduced, thereby not only reducing the ignition risk of igniting liquid or gas, but also reducing the ignition risk caused by LiPF6The reaction with moisture to form Hydrogen Fluoride (HF) is harmful.
Further, the positive electrode active material (also referred to as an active cathode material) selected for the positive electrode active material layer may be any active material known in the art. For example, the positive active material may include at least LiCoO2Lithium nickel cobalt manganese oxide (NCM), lithium nickel cobalt aluminum oxide (NCA), high energy NCM (HE-NCM), lithium iron phosphate, lithium manganese spinel (LiMn)2O4) Any of free lithium transition metal oxides (also referred to as lithium metal oxides), layered oxides, spinels, olivine compounds, silicate compounds and mixtures thereof.
Further, the anode active material selected for the anode active material layer may be any active material known in the art. For example, lithium metal oxides, lithium titanium oxides, metal oxides, carbonaceous materials such as graphite (e.g., synthetic graphite, natural graphite), graphene, intermediate carbon, doped carbon, hard carbon, soft carbon, fullerenes, mixtures of silicon and carbon, silicon, tin, metallic lithium, or alloys that can be alloyed with lithium and mixtures thereof.
Further, the binder may be selected from polyvinylidene fluoride (PVDF), polyvinylidene fluoride-hexafluoropropylene copolymer (PVDF-HFP), polyethylene oxide (PEO), polytetrafluoroethylene, ethylene, polyacrylate, styrene butadiene rubber, and carboxymethyl cellulose (CMC), and mixtures and copolymers thereof.
Further, the liquid electrolyte comprises a solvent and a conductive salt solution;
wherein, can select ionic liquid as solvent, ionic liquid includes: N-methyl-N-propylpiperidine bis (trifluoromethylsulfonyl) imide, N-methyl-N-butylpyrrolidinium bis (trifluoromethyl) sulfonimide, N-butyl-N-trimethylammonium bis (tri) fluoromethylsulfonylimide, triethylbis (tri) fluoromethylsulfonyl) imide, and N, N-diethyl-N-methyl-N- (2-methoxyethyl) bis (trifluoromethyl) ammonium sulfonimide;
the conductive salt solution preferably includes an organic solvent such as ethylene carbonate, propylene carbonate, butylene carbonate, dimethyl carbonate, diethyl carbonate, ethylmethyl carbonate, sulfolane, 2-methyltetrahydrofuran, and 1, 3-dioxolane.
As a preferred embodiment, wherein, the hole structure comprises a first micropore with a first preset hole diameter and a second micropore with a second preset hole diameter;
the proportion of the second micropores in the pore structure is more than or equal to 70 percent.
As a preferred embodiment, wherein the first preset aperture is 5um;
the second preset aperture is 1 um-2 um.
In a preferred embodiment, the proportion of the pore structure in the polymer coating is 85% or more.
In a preferred embodiment, the separator substrate may be a polymer selected from the group consisting of: polyesters, preferably polyethylene terephthalate, and polyolefins. Preferably polyethylene, polypropylene, polyacrylonitrile, polyvinylidene fluoride, polyetherimide, polyimide, polyamide, polyether, polyetherketone or mixtures thereof. The separator substrate includes at least one polymer composition, and has porosity so as to be permeable to lithium ions (Li +).
In a preferred embodiment, the polymer coating layer includes at least one of an olefin-based polymer electrolyte coating layer, a polyester-based polymer electrolyte coating layer, and a polyether-based polymer electrolyte coating layer.
Specifically, in the present embodiment, the polymer coated on the diaphragm substrate mainly includes an olefin polymer electrolyte coating, a polyester polymer electrolyte coating, and a polyether polymer electrolyte coating, wherein the most common polymer electrolyte coating mainly includes polyethylene oxide, polyvinylidene fluoride, polymethyl methacrylate, polyacrylonitrile, polyimide, etc., wherein the polymer in the polymer electrolyte coating has a molecular weight of about 500000, and a surface thereof has a pore structure, and a pore distribution thereof mainly includes first micropores and second micropores, wherein the pore size of the first micropores is about 5 μm, and the pore size of the second micropores is about 1-2 μm, and wherein the ratio of the second micropores is larger, and is about 70% or more.
Furthermore, the porosity of the polymer coating is also higher, the porosity accounts for more than 85%, and the electrolyte retention capacity is strong.
As a preferred embodiment, wherein the solid inorganic lithium ion conductor is a crystalline electrolyte;
the crystalline electrolyte includes at least any one of perovskite type, NASICON type, LISICON type or garnet type solid electrolytes.
As a preferred embodiment, wherein the solid inorganic lithium ion conductor is composed of particles;
the particles have a particle diameter D50 of 0.05 μm to 5 μm, preferably a particle diameter D50 of 0.1 μm to 2 μm, the specific measurement values of which are determined by Scanning Electron Microscopy (SEM).
As a preferred embodiment, among others, the weight percentage of the solid inorganic lithium ion conductor in the polymer coating layer on the separator substrate is 10 to 50%, preferably 20 to 40wt%.
As a preferred embodiment, among them, the solid inorganic lithium ion conductor has an ionic conductivity of more than 10-4s/cm。
Example one
First, a 25 μm three-layer polyethylene separator substrate was selected with a porosity of about 40%. Subsequently, 2g of polyvinylidene fluoride-hexafluoropropylene (PVDF-HFP) copolymer having a molecular weight of 500000 grade was dissolved in 100ml of acetone at room temperature. A viscous solution was formed by continuous stirring, and 12g of garnet-type LLZO particles (D50: 80 nm) having a uniform fineness were stirred in the solution by a stirrer until a suspension having a uniform viscosity was formed. Subsequently, a polyethylene separator substrate was impregnated in the above suspension, and after completion of the impregnation and removal of acetone, a composite separator with a ceramic electrolyte was obtained in which the volume porosity of the separator substrate was maintained at around 20%.
Example two
First, a 25 μm three-layer polyethylene separator substrate was selected with a porosity of about 40%. Subsequently, 2g of PVDF-HFP copolymer with a molecular weight of 500000 grade are dissolved in 100ml of acetone at room temperature. A viscous solution was formed by continuous stirring, and 16g of garnet-type LLZO particles (D50: 80 nm) having a uniform fineness were stirred into the solution by a stirrer until a suspension having a uniform viscosity was formed. Subsequently, a polyethylene separator substrate was impregnated in the above suspension, and after completion of the impregnation and removal of acetone, a composite separator with a ceramic electrolyte was obtained in which the volume porosity of the separator substrate was maintained at around 20%.
EXAMPLE III
First, a 25 μm three-layer polyethylene separator substrate was selected, with a porosity of about 40%, and purchased from Celgard, USA. Subsequently, 2g of PVDF-HFP copolymer with a molecular weight of 500000 grade are dissolved in 100ml of acetone at room temperature. A solution with a certain viscosity was formed by continuous stirring, and 20g of garnet-type LLZO particles (D50: 80 nm) having a uniform fineness were stirred into the solution by a stirrer until a suspension having a uniform viscosity was formed. Subsequently, a polyethylene separator substrate was impregnated in the above suspension. After the impregnation is completed and the acetone is removed, a composite separator with a ceramic electrolyte is obtained, wherein the volume porosity of the separator substrate is kept around 20%.
In the preferred embodiment, the steel sheets are used as the battery anode 1 and the battery cathode 3 in the embodiment of the invention, the CR2032 type steel sheet/diaphragm/steel sheet battery is obtained by assembling, EIS tests are performed on batteries of different diaphragm types by using an AutoLab type electrochemical workstation, and the corresponding interface resistance test results are as follows in table 1:
TABLE 1 Membrane types and corresponding interface resistances
Wherein the test frequency of Table 1 is 100mHz-100kHz.
As can be seen from table 1, the initial interface resistance of the lithium ion battery using the blank separator is relatively maximum, mainly because the blank separator is in direct contact with the lithium negative electrode, and the formed Solid Electrolyte Interface (SEI) cannot reduce the interface resistance compared with the conventional one. In the embodiment of the invention, after the solid inorganic lithium ion conductor is added in the polymer coating coated on the surface of the diaphragm substrate, the SEI film formed on the interface corresponding to the battery cathode 3 is the intermediate phase between the battery cathode 3 and the electrolyte, and the initial interface resistance of the SEI film is obviously reduced compared with that of a blank diaphragm.
In addition, as can be seen from the electrochemical process, the rising tendency of the interfacial resistance of the battery negative electrode and the separator substrate is significantly reduced as the reaction process proceeds, which indicates that the formed SEI film can promote the deintercalation process of lithium ions to some extent. As can be seen from the above Table 1, when the solid inorganic lithium ions were present in an amount of 30% by weight relative to the separator substrate, the interfacial resistance was minimized, indicating that a threshold value of a resistance interval existed between the positive and negative electrodes of the battery and the electrolyte interface, and the electrolyte content was too high and certainly improved the interfacial resistance.
Adopt above-mentioned technical scheme to have following advantage or beneficial effect: the present invention can reduce the contact resistance between particles of the solid inorganic lithium ion conductor, whether the amount of the solvent of the liquid electrolyte or the amount of the conductive salt solution (particularly LiPF), by arranging the solid inorganic lithium ion conductor and the liquid electrolyte in the pore structure communicating with each other6) Can be effectively reduced, thereby not only reducing the ignition risk of igniting liquid or gas, but also reducing the ignition risk caused by LiPF6The reaction with moisture to form Hydrogen Fluoride (HF) is harmful.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made without departing from the spirit and scope of the invention.
Claims (10)
1. A solid state lithium ion battery comprising a composite electrolyte separator, comprising:
a battery positive electrode including a positive electrode active material layer;
a battery anode comprising an anode active material layer, a binder;
the composite electrolyte diaphragm is arranged between the battery anode and the battery cathode and comprises a diaphragm substrate and a polymer coating, the polymer coating is coated on the surface of the diaphragm substrate, the surface of the polymer coating is provided with a hole structure which is communicated with each other, and a solid inorganic lithium ion conductor and a liquid electrolyte are filled in the hole structure.
2. The solid state lithium ion battery comprising a composite electrolyte membrane according to claim 1, wherein the pore structure comprises first micropores of a first predetermined pore size and second micropores of a second predetermined pore size;
the proportion of the second micropores in the pore structure is greater than or equal to 70%.
3. The composite electrolyte membrane-containing solid state lithium ion battery of claim 2, wherein the first predetermined pore size is 5um;
the second preset aperture is 1 um-2 um.
4. The solid state lithium ion battery comprising a composite electrolyte membrane according to claim 1, wherein the proportion of the pore structure in the polymer coating is 85% or more.
5. The solid state lithium ion battery with the composite electrolyte membrane according to claim 1, wherein the membrane substrate comprises a polymer comprising at least any one of polyester, polyethylene terephthalate, polyolefin, polyethylene, polypropylene, polyacrylonitrile, polyvinylidene fluoride, polyetherimide, polyimide, polyamide, polyether, and polyetherketone.
6. The solid lithium ion battery comprising the composite electrolyte membrane according to claim 1, wherein the polymer coating layer comprises at least one of olefin, polyester and polyether polymer electrolyte coating layers.
7. The solid state lithium ion battery comprising a composite electrolyte membrane according to claim 1, wherein the solid inorganic lithium ion conductor is a crystalline electrolyte;
the crystalline electrolyte includes at least any one of perovskite type, NASICON type, LISICON type or garnet type solid electrolytes.
8. The solid state lithium ion battery comprising a composite electrolyte membrane according to claim 1, wherein the solid inorganic lithium ion conductor is comprised of particles;
the particle diameter D50 of the particles is 0.05-5 mu m.
9. The solid state lithium ion battery comprising the composite electrolyte membrane according to claim 1, wherein the solid inorganic lithium ion conductor is present in an amount of 10 to 50% by weight.
10. The solid state lithium ion battery comprising a composite electrolyte membrane according to claim 1, wherein the solid inorganic lithium ion conductor has an ionic conductivity greater than 10-4s/cm。
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116722202A (en) * | 2023-04-28 | 2023-09-08 | 中南大学 | Modified fluorinated polyolefin-based solid electrolyte and preparation and application thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116722202A (en) * | 2023-04-28 | 2023-09-08 | 中南大学 | Modified fluorinated polyolefin-based solid electrolyte and preparation and application thereof |
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