CN105655649A - Incombustible electro-deposition lithium battery and application thereof - Google Patents
Incombustible electro-deposition lithium battery and application thereof Download PDFInfo
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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
- H01M10/058—Construction or manufacture
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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
- 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
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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
- 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
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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
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/38—Selection of substances as active materials, active masses, active liquids of elements or alloys
- H01M4/381—Alkaline or alkaline earth metals elements
- H01M4/382—Lithium
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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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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The invention discloses an incombustible electro-deposition lithium battery with high specific energy. A battery system comprises one or more type of incombustible phosphate ester or phosphonate [RP(O)OR<1>OR<2>] which is used as an incombustible electrolyte solvent, lithium salt and additives are added into electrolyte, an anode comprises LiCoO<2>, LiMn<2>O<4>, Li[Li<0.13>Ni<0.304>Mn<0.566>] O<2> and the like, and a matrix of a cathode comprises conductive metal. The incombustible electro-deposition lithium battery has the advantages that in battery charging procedures, lithium ions can be released from anode materials, are fed into the electrolyte, then reach the cathode via the electrolyte and are deposited on the surface of the cathode by means of electro-deposition reaction in a metal lithium form; in battery discharging procedures, electrons of metal lithium in the cathode return the electrolyte in a lithium ion form, the lithium ions in the electrolyte are simultaneously embedded into crystal structures of the anode materials, and accordingly energy can be reversibly converted; the high-safety lithium battery system with high specific energy can be implemented on the basis of the incombustible phosphate ester electrolyte and the high-capacity electro-deposition lithium electrodes.
Description
Technical field
The present invention relates to a kind of noninflammability electro-deposition lithium battery, belong to electrochemical energy technical field.
Background technology
Lithium battery, owing to having the advantages such as high-energy-density, high voltage, environmental friendliness, low self-discharge, is widely used in the fields such as all kinds of portable type electronic product, electric automobile, energy storage, military and aeronautical product. But, safety and the high-energy-density problem of lithium battery are unable to have both at one and the same time always. Although there is higher energy density with the lithium battery that lithium metal is negative pole, yet with lithium metal itself, there is high chemism, burning and explosion accident very easily occur. Therefore, with the appearance of the lithium ion battery that graphite is negative pole, the safety of lithium battery is significantly improved. But, lithium ion battery overcharging, overheated, pierce through, thermal runaway can be caused under the condition such as extruding, also result in burning even to explode, this adopts flammable carbonic ester as electrolyte mainly due to current lithium ion battery, in extreme circumstances, electrolyte itself very easily burns, and causes the insecurity of whole battery.
In order to solve the safety issue of lithium ion battery, adopting some safety measures, such as inherent and external safety precautions, external safety measure mainly has the imbibition material etc. of overcharge protection circuit, PTC resistor, relief valve and battery outer cladding; Inherent safety measure mainly has temperature sensitive electrode, potential-sensitive separator, heat-blockage hole barrier film, fire-retardant or noninflammability electrolyte, aerogenesis additive and overcharge protection additives etc. Although these safety precautions can improve the safety of battery in certain limit, but still cannot solve the potential safety hazard that highly combustible organic electrolyte brings.
Additionally, with the lithium battery that lithium metal is negative pole, there is the specific energy higher than the lithium ion battery that graphite is negative pole, it it is the important directions of the battery of future development high specific energy, and high specific energy means that and can face more serious safety problem, and want the combustion problem thoroughly solving battery, it is necessary to development noninflammability electrolyte system.
In numerous electrolyte, Solid inorganic electrolyte, polymer dielectric, ionic liquid etc. have good noninflammability, are development non-ignitibility electrolyte important directions, but each with the limitation each used. The Solid inorganic electrolyte of macroion conduction is the best substitute of liquid electrolyte, and they at high temperature do not burn completely, and electrochemical window is very wide, and electrical conductivity even can reach 2.2 �� 10-3S.cm-1(thio-LISICON).Inoganic solids lithium-ion electrolyte can be divided into again crystal-type, compound and glassy state amorphous build by its crystalline structure. Wherein, crystal-type solid electrolyte is broadly divided into Perovskite type, NASICON type, LISICON type, LiPON type, Li3PO4-Li4SiO4Type, GARNET type; Compound main it is composited by lithium ion conductor and some insulator, such as Al2O3-LiI; And amorphous state solid electrolyte mainly includes oxide glass and the big based solid electrolyte material of chalcogenide glass two. But, there is relatively low conductance due to current solid inorganic electrolytes and molding processibility is poor, hinder its application development. Polymer dielectric can be divided into solid polymer electrolyte and gel polymer electrolyte by polymer. Compared with gel polymer electrolytes, the electrical conductivity of solid polymer electrolyte is relatively low, so being still in conceptual phase. And gel polymer electrolytes can use in secondary lithium battery, main cause is exactly gel electrolyte is polymer swelling formation in carbonic ester electrolyte, electrochemical properties, physicochemical properties are all close with carbonic ester electrolyte, but more excellent than carbonic ester it is, its safety is significantly high, and machinery can be prevented out of control. But this gel electrolyte still contains a large amount of flammable electrolyte so that battery still has burning and the potential safety hazard of blast. Ionic liquid at room temperature is because of its wider electrochemical window, noninflammability, heat stability are significantly high, good with electrode material compatibility, the character such as lithium salts dissolubility is good and Applicable temperature scope is very wide are of great interest, but ionic liquid also exists, and cost is too high, the big subject matter affecting ionic conduction of viscosity.
In sum, development has high specific energy, the lithium battery of high safety is the trend being suitable for high-end portable formula electronic product, electric automobile and the application of energy storage system. Therefore, develop a kind of noninflammability, environmental friendliness, function admirable lithium battery significant.
Little molecular phosphorus acid esters compound has the advantages that molten boiling point is high, viscosity is low, dielectric constant is high, and industrial source is extensive, is being preferably selected of noninflammability electrolyte. But, in current research, the problem that phosphate compounds is primarily present is, it can be had stronger catalyticing decomposition action by material with carbon element, thus causing that first all efficiency is low, and the SEI film that cannot be formed at material surface, thus causing that first all efficiency is low, destroy the structure of material with carbon element simultaneously. Must be added some help film forming in order to alleviate these phenomenons such as the film for additive of FEC, LiBOB etc, but obtain good effect. This series of reason hinders phosphoric acid ester electrolyte and does the development in the lithium-ion battery system of negative pole at material with carbon element. Therefore, it is contemplated that do not use material with carbon element, and in battery, directly form the lithium battery system of metal lithium electrode in electro-deposition mode, it is possible to the problem avoiding well using material with carbon element to bring.
Summary of the invention
In order to solve poor stability that existing lithium secondary battery system exists and the problem such as specific energy is low, the invention provides a kind of lithium battery system do not fired and directly form metal lithium electrode in battery in electro-deposition mode. This lithium battery system not only has high safety, and be negative pole owing to directly using electro-deposition lithium, there is the specific capacity higher than usual graphite cathode, substantially increase the energy density of whole battery system, compared with existing lithium-ion battery system, this noninflammability electro-deposition lithium battery not only has high safety, also has high-energy-density and excellent chemical property.
The purpose of the present invention is achieved through the following technical solutions:
A kind of noninflammability electro-deposition lithium battery, including positive pole, negative pole, barrier film and noninflammability electrolyte, described positive pole obtains in the following manner: size mixing with N-Methyl pyrrolidone after positive active material, conductive material and bonding agent being mixed, it is coated onto in metal forming, after vacuum drying, is cut into corresponding size;
Described negative pole is foil-like or net-shaped conductive metal;
Described noninflammability electrolyte is made up of noninflammability phosphate ester, additive and lithium salts;
Described additive is film for additive, short depositing additives, promotes the additive of lithium metal deposition and dendrite planarizing, improves the mixture of one or more that electrical conductivity drops in low viscous additive;
The structural formula of described noninflammability phosphate ester is
In formula, R is that one or more in F, Cl, Br are monosubstituted or polysubstituted haloalkyl or halogenated alkoxy;
R1��R2Identical or different, R1��R2Monosubstituted or the polysubstituted haloalkyl for one or more in F, Cl, Br.
Described positive active material is LiCoO2��LiFePO4��LiMn2O4��(LiCoxNiyMn1-x-yO2) or rich lithium (xLiMnO3(1-x)LiMO2);
Described conductive material is acetylene black, SurperP, graphite, CNT or Graphene;
Described bonding agent is Kynoar or politef.
Described conducting metal is copper, lithium, ferrum, nickel or titanium.
In order to improve negative electricity chemical property, conducting base surface may be trimmed process, and its decorative layer can be polymer, such as PEO, polyacrylate, polyaniline, polypyrrole, polythiophene etc.; Decorative layer is alternatively carbon, metal and metal-oxide simultaneously, such as carbons, Al, Sn, Sb, its oxide and LiN, Li14MGeO4��LiTi2P3O12��Li2S-P2S5And LiPON.
Described barrier film is microporous polyolefin film.
Described film for additive is the mixture of one or more in ethylene carbonate (EC), ethylene sulfite (ES), fluorinated ethylene carbonate (FEC), chlorocarbonic acid vinyl acetate (ClEC), vinylene carbonate (VC), vinylcarbonates (VEC);
It is the mixture of one or more in diethyl carbonate (DEC), Ethyl methyl carbonate (EMC), dimethyl carbonate (DMC), glycol dimethyl ether (DME) that low viscous additive drops in described raising electrical conductivity;
The described additive promoting lithium metal deposition and dendrite planarizing is the mixture of one or more in NHD, Perfluorooctane sulfonates lithium (LiFOS), etamon perfluoro octane sulfonate (TEAFOS).
Described lithium salts is LiPF6��LiBF4��LiClO4��LiN(CF3SO2)2��LiN(FSO2)2, the mixture of one or more in LiBOB.
In order to ensure that electrolyte does not fire completely, in described noninflammability electrolyte, the percentage by volume of noninflammability phosphate ester is more than 50%, and the percentage by volume of additive is 0��50%, and the concentration of lithium salts is 0.5��5mol/L.
Above-mentioned noninflammability electro-deposition lithium battery is as the application of accumulation power supply.
The present invention does not fire the operation principle of electro-deposition lithium battery:
Positive pole, negative pole, barrier film and noninflammability phosphate ester electrolyte are assembled into lithium battery by the present invention; In battery charging process, lithium ion is deviate to enter electrolyte from positive electrode, reaches negative pole again through electrolyte, and is deposited on negative terminal surface through electrodeposit reaction with lithium metal form; In battery discharge procedure, negative metal lithium loses electronics and returns in electrolyte with lithium ion form, and the lithium ion in electrolyte is simultaneously embedded in the crystal structure of positive electrode, it is achieved thereby that reversible energy converts. This system achieves the unification do not fired with high-energy-density.
Compared with present technology, the present invention has the following advantages and beneficial effect:
1. lithium battery of the present invention is realized lithium metal and deposit by reversible electrochemical reaction on conducting base and dissolve, and completes the energy conversion of battery system, it is possible to substitute the carbon negative pole material of low capacity, it is possible to be effectively improved the specific energy of battery system;Realizing lithium metal by reversible electrochemical reaction deposit on conducting base and dissolve, the energy completing battery system converts.
2. the present invention adopts non-ignitibility electrolyte, thoroughly avoids the potential safety hazard because adopting lithium metal to cause as negative pole, it is achieved that the unification of high security and high-energy-density;
3. conductive base is carried out finishing and uses additive to promote lithium deposition and Li dendrite planarizing by the present invention, improves the heat stability of battery.
Accompanying drawing explanation
Fig. 1 is the combustion experiment of embodiment 3 noninflammability electrolyte;
Fig. 2 is embodiment 4Li/LiCoO2Battery charging and discharging curve figure in noninflammability electrolyte;
Fig. 3 is embodiment 5Li/LiMn2O4Battery charging and discharging curve figure in noninflammability electrolyte;
Fig. 4 is embodiment 6Li/Li [Li0.13Ni0.304Mn0.566]O2Battery charging and discharging curve figure in noninflammability electrolyte;
Fig. 5 is embodiment 8Li/LiCoO2Battery charging and discharging curve figure in noninflammability phosphate ester electrolyte.
Detailed description of the invention
The embodiments described below are only a part of embodiment of the present invention, rather than whole embodiments. Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art obtain under not making creative work premise, broadly fall into protection scope of the present invention.
Embodiment 1: the preparation of noninflammability phosphate ester electrolyte
Noninflammability phosphate ester solvent is for trimethyl phosphate (TMP), triethyl phosphate (TEP), dimethyl methyl phosphonate (DMMP), diethyl ethylphosphate (DEEP), methyl acid phosphate two trifluoro ethyl ester (TFMP), ethyl phosphonic acid two trifluoro ethyl ester (TFEP), trifluoroethyl phosphate ester (TFP).
In argon glove box (oxygen value is less than 10ppm), preparation is containing 0.8MLiPF6Noninflammability phosphate ester electrolyte, wherein additive (the FEC (fluorinated ethylene carbonate) containing 0-20%, EC (ethylene carbonate), DME (glycol dimethyl ether), EMC (Ethyl methyl carbonate), VC (vinylene carbonate), LiFOS (Perfluorooctane sulfonates lithium), TEAFOS (etamon perfluoro octane sulfonate) etc.), and for flammable and electrochemical property test.
Embodiment 2: the assembling of lithium ion battery
The lithium ion battery of the present invention is made up of above-mentioned electrolyte, positive pole, negative pole and barrier film, and wherein, the active substance constituting positive pole can be LiMn2O4, LiCoO2, Li [Li0.13Ni0.304Mn0.566]O2Deng.
Negative pole is for Copper Foil.
By positive electrode active materials (LiCoO2��LiMn2O4��Li[Li0.13Ni0.304Mn0.566]O2), the N-Methyl pyrrolidone (4% mass fraction) of Kynoar (PVDF) and SuperP and acetylene black 80:8:6:6 in mass ratio mixing, after using N-Methyl pyrrolidone to size mixing, it is coated onto on aluminium foil, after vacuum drying, determines corresponding size (��0.5cm2) film stand-by.
Argon glove box assembles in (oxygen value is less than 10ppm) 2016 type half-cells test, all adopt constant current charge-discharge pattern, with 50mAg-1Electric current density discharge and recharge.
Embodiment 3
Being undertaken lighting test by phosphorus (phosphine) the acid esters electrolyte prepared, for TMP, preparation is containing 0.8MLiPF6With the TMP electrolyte of 10%FEC for combustion experiment, result is as shown in Figure 1. Carbonic ester electrolyte very easily burns as can see from Figure 1, and TMP electrolyte is put do not fire completely, has significantly high safety.
Embodiment 4
With containing 0.8MLiPF6It is electrolyte with the TEP solvent of 10%FEC, with LiCoO2It is negative pole for positive pole, Cu paper tinsel, and assembles LiCoO2/ Li battery. On LAND cell tester, after standing six hours, with 50mAg-1Electric current density charge-discharge test, voltage range 3-4.25V.
LiCoO2/ Li battery charging and discharging curve figure in the electrolytic solution is as shown in Figure 2. From Figure 2 it can be seen that LiCoO2/ Li battery head week specific discharge capacity is 143mAhg-1, and coulombic efficiency is 93%, with the similar nature in usual carbonic ester electrolyte.
Embodiment 5
With containing 0.8MLiPF6, 5%FEC and 5%DME DMMP solvent be electrolyte, with LiMn2O4It is negative pole for positive pole, Cu paper tinsel, and assembles LiMn2O4/ Li battery. On LAND cell tester, after standing six hours, with 50mAg-1Electric current density charge-discharge test, voltage range 3-4.3V.
LiMn2O4/ Li battery charging and discharging curve figure in the electrolytic solution is as shown in Figure 3. As seen from Figure 3, LiMn2O4/ Li battery head week specific discharge capacity is 104mAhg-1, and coulombic efficiency is 80%, with the similar nature in usual carbonic ester electrolyte.
Embodiment 6
With containing 0.8MLiPF6, 5%VC and 5%EMC TMP solvent be electrolyte, with Li [Li0.13Ni0.304Mn0.566]O2It is negative pole for positive pole, Cu paper tinsel, and assembles Li [Li0.13Ni0.304Mn0.566]O2/ Li battery. On LAND cell tester, after standing six hours, with 30mAg-1Electric current density charge-discharge test, voltage range 2-4.8V.
Li[Li0.13Ni0.304Mn0.566]O2/ Li battery charging and discharging curve figure in the electrolytic solution is as shown in Figure 4. From fig. 4, it can be seen that Li [Li0.13Ni0.304Mn0.566]O2/ Li battery head week specific discharge capacity is 181mAhg-1, shows high discharge capacity.
Embodiment 7
With containing 0.8MLiFSI, 5%FEC and 5%VC TFP solvent for electrolyte, with LiMn2O4It is negative pole for positive pole, Cu paper tinsel, and assembles LiMn2O4/ Li battery. On LAND cell tester, after standing six hours, with 50mAg-1Electric current density charge-discharge test, voltage range 3-4.3V.
LiMn2O4/ Li battery head week specific discharge capacity is 106mAhg-1, and coulombic efficiency is 86%, with the similar nature in usual carbonic ester electrolyte.
Embodiment 8
With the TMP solvent containing 0.8MLiTFSI, 2%VC and 8%VEC and 1%LiBOB for electrolyte, with LiCoO2It is negative pole for positive pole, Cu paper tinsel, and assembles LiCoO2/ Li battery. On LAND cell tester, after standing six hours, with 50mAg-1Electric current density charge-discharge test, voltage range 3-4.25V.
LiCoO2/ Li battery head week specific discharge capacity is 148mAhg-1, and coulombic efficiency is 95.6%, with the similar nature in usual carbonic ester electrolyte.
Above disclosed it is only one preferred embodiment of the present invention, it is impossible to limit the scope of the claims in the present invention protection, the equivalent variations therefore made according to the present patent application the scope of the claims with this, still fall within the scope contained of the present invention.
Claims (8)
1. a noninflammability electro-deposition lithium battery, including positive pole, negative pole, barrier film and noninflammability electrolyte, it is characterised in that:
Described positive pole obtains in the following manner: sizes mixing with N-Methyl pyrrolidone after positive active material, conductive material and bonding agent being mixed, is coated onto in metal forming, is cut into corresponding size after vacuum drying;
Described negative pole is foil-like or net-shaped conductive metal;
Described noninflammability electrolyte is made up of noninflammability phosphate ester, additive and lithium salts;
Described additive is film for additive, short depositing additives, promotes the additive of lithium metal deposition and dendrite planarizing, improves the mixture of one or more that electrical conductivity drops in low viscous additive;
The structural formula of described noninflammability phosphate ester is
In formula, R is that one or more in F, Cl, Br are monosubstituted or polysubstituted haloalkyl or halogenated alkoxy;
R1��R2Identical or different, R1��R2Monosubstituted or the polysubstituted haloalkyl for one or more in F, Cl, Br.
2. noninflammability electro-deposition lithium battery according to claim 1, it is characterised in that:
Described positive active material is LiCoO2��LiFePO4��LiMn2O4, ternary material or rich lithium material;
Described conductive material is acetylene black, SurperP, graphite, CNT or Graphene;
Described bonding agent is Kynoar or politef.
3. noninflammability electro-deposition lithium battery according to claim 1, it is characterised in that: described conducting metal is copper, lithium, ferrum, nickel or titanium.
4. noninflammability electro-deposition lithium battery according to claim 3, it is characterised in that: described conducting metal is modified with poly(ethylene oxide), polyacrylate, polyaniline, polypyrrole, polythiophene, Graphene, carbon fiber, Al, Sn, Sb, Al2O3��SnO2��SbO2��LiN��Li14MGeO4��LiTi2P3O12��Li2S-P2S5Or LiPON.
5. noninflammability electro-deposition lithium battery according to claim 1, it is characterised in that: described barrier film is microporous polyolefin film.
6. noninflammability electro-deposition lithium battery according to claim 1, it is characterised in that:
Described film for additive is the mixture of one or more in ethylene carbonate, ethylene sulfite, fluorinated ethylene carbonate, chlorocarbonic acid vinyl acetate, vinylene carbonate, vinylcarbonates;
It is the mixture of one or more in diethyl carbonate, Ethyl methyl carbonate, dimethyl carbonate, glycol dimethyl ether that low viscous additive drops in described raising electrical conductivity;
The described additive promoting lithium metal deposition and dendrite planarizing is the mixture of one or more in NHD, Perfluorooctane sulfonates lithium, etamon perfluoro octane sulfonate;
Described lithium salts is LiPF6��LiBF4��LiClO4��LiN(CF3SO2)2��LiN(FSO2)2, the mixture of one or more in LiBOB.
7. noninflammability electro-deposition lithium battery according to claim 1, it is characterized in that: in described noninflammability electrolyte, the percentage by volume of noninflammability phosphate ester is more than 50%, and the percentage by volume of additive is 0��50%, and the concentration of lithium salts is 0.5��5mol/L.
8. the noninflammability electro-deposition lithium battery described in any one of claim 1 to 7 is as the application of accumulation power supply.
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| CN107591562A (en) * | 2016-07-06 | 2018-01-16 | 宁德时代新能源科技股份有限公司 | Electrolyte and lithium ion battery |
| CN108346778A (en) * | 2018-02-07 | 2018-07-31 | 清华大学 | A kind of electrochemical method preparing ultra-thin lithium an- ode |
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| CN109449490A (en) * | 2018-10-18 | 2019-03-08 | 中国科学技术大学 | A kind of phosphate-based lithium ion battery non-ignitable safe electrolyte and lithium ion battery that reducing agent improves |
| CN109713365A (en) * | 2017-10-25 | 2019-05-03 | 丰田自动车株式会社 | Electrolyte composition and lithium ion secondary battery |
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| CN113054251A (en) * | 2019-12-27 | 2021-06-29 | 张家港市国泰华荣化工新材料有限公司 | Electrolyte suitable for high-voltage system lithium ion battery and lithium ion battery |
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