CN106935906A - A kind of functional form polymer dielectric and its application in lithium ion battery - Google Patents

A kind of functional form polymer dielectric and its application in lithium ion battery Download PDF

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CN106935906A
CN106935906A CN201710299256.0A CN201710299256A CN106935906A CN 106935906 A CN106935906 A CN 106935906A CN 201710299256 A CN201710299256 A CN 201710299256A CN 106935906 A CN106935906 A CN 106935906A
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electrolyte
polymer dielectric
functional form
form polymer
ceramic powder
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张鹏
方剑慧
林艳
赵世勇
郑军伟
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Zhangjiagang Guotai Huarong New Chemical Materials Co Ltd
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Zhangjiagang Guotai Huarong New Chemical Materials 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
    • H01M10/056—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
    • H01M10/0565—Polymeric materials, e.g. gel-type or solid-type
    • 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
    • H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
    • 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
    • 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
    • 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 present invention relates to a kind of functional form polymer dielectric, including electrolyte matrix and propylene carbonate ester group electrolyte（PC base electrolyte）Described electrolyte matrix includes polymeric matrix, described electrolyte matrix also includes the functionalization ceramic powder being dispersed in described polymeric matrix, described functionalization ceramic powder is had the film for additive functional group that can make graphite that SEI films are formed in propylene carbonate ester group electrolyte to be formed by the surface grafting of ceramic powder, and the general structure of described film for additive functional group is：

Description

A kind of functional form polymer dielectric and its application in lithium ion battery
Technical field
The invention belongs to electrochemical technology field, and in particular to a kind of functional form polymer dielectric and its in lithium-ion electric Application in pond.
Background technology
Lithium ion battery as a kind of energy density it is high, output voltage is high, memory-less effect, environment-friendly Green Chemistry Power supply, with good economic benefit, social benefit and strategic importance, has been widely used in mobile communication, digital product etc. Every field.Typically using lithium intercalation compound as positive and negative electrode material, organic solvent dissolves the non-of lithium salts to lithium rechargeable battery Water-Electrolyte is used as electrolyte.In this liquid electrolyte systems, inflammable carbonic ester being used organic solvent, long-term more There is leakage and uneasy congruence factor, a key issue as restriction lithium rechargeable battery development in charge and discharge process. At present, the main method for solving this problem is to replace liquid electrolyte using polymer dielectric.
Polymer dielectric can be divided into pure solid polymer electrolyte and gel polymer electrolyte, area according to form point Not being the former, the latter contains a certain amount of liquid plasticizer without liquid plasticizer.General pure solid polymer electrolyte Ionic conductivity often do not reach the requirement of application, if adding plasticizer to form gel polymer electrolyte, its mechanicalness Can not can meet again.At present, a class adds inorganic oxide particle such as titanium dioxide, silica etc. to be formed to polymeric system Composite polymer electrolyte turn into research focus.Organic inorganic composite polymer electrolyte is mainly in polymeric matrix Addition inorganic filler, filler is by the physical cross-linked network system with polymer segment formation centered on filler, enhancing polymerization The ability of thing dispersive stress, improves the mechanical performance and heat endurance of polymer dielectric.
Be presently used for activated polymer electrolyte and form the electrolyte solvent almost all that is used of gelatin polymer film be With the mixing solvent that ethylene carbonate (EC) is made up of key component.The sharpest edges of ethylene carbonate are can be in height Graphitized carbon material surface forms form compact and stable solid electrolyte interface film (SEI films), by the passivating film that is formed more Densification, can effectively prevent ethylene carbonate further decomposition and altogether it is embedding, so as to ensure that carbon negative pole material is normally electrochemical Learn performance.But EC fusing points in itself are (about 36 DEG C) higher, although can be by adding the cosolvent such as DEC, DMC reduction electrolyte Fusing point, but generally its minimum temperature in use be also only -20 DEG C, this significantly limits lithium ion battery in low temperature Under the conditions of performance.Now with the fast development of the high-technology fields such as military, polar region scientific investigation and Aero-Space, to lithium from The low temperature of sub- battery proposes requirement very high using scope and performance, therefore the cryogenic property of lithium ion battery is to solve One of pressing issues, the extension of the main composition of electrolyte to performance of lithium ion battery is increasingly important.Wherein with propylene carbonate Ester (PC) provides a kind of feasible approach for the electrolyte system of solvent to solve the problem.
The fusing point of PC is more much lower than EC, about -49 DEG C, and with excellent cryogenic property, and its electrical conductivity is higher, price Also it is cheap, therefore be considered as the most suitable solvent for low-temperature electrolyte.But the electrolysis with PC as major solvent component The poor compatibility of liquid and high-graphitized carbon electrode material, efficiency for charge-discharge is low, and its main cause is PC in graphite electrode Decompose on surface, it is impossible to form fine and close, effective SEI films, be in now correspond to solvation Li on discharge curve+It is embedding altogether 0.7-0.8V is (relative to Li/Li+) left and right platform, ultimately result in the stripping of graphite electrode, there is efflorescence, cause graphite electrode Reversible capacity is decreased obviously completely losing for even cycle performance, therefore is generally acknowledged that PC electrolyte is not suitable for graphitization Material is used as in the lithium ion battery of negative pole.
Film for additive is that it is preferentially reduced on the negative material such as graphite surface, forms the class electrolyte addition of SEI films Agent.Film for additive is added by PC base electrolyte, graphitized carbon material can be made to have in PC base electrolyte good Chemical property, so as to play improve lithium ion battery cryogenic property, extension lithium ion battery using scope effect.Mesh Before, the film for additive that research is used mainly has：With CO2、SO2For the gas of representative, with LiCO3For the solid for representing and with carbon Sour vinylene (VC), benzimidazole, ethylene sulfite, cyanofuran etc. are the liquid additive of representative.But, solid and Additives gas have that solubility is low, therefore limit the performance of its effect.And liquid additive is then often present surely Problem in terms of qualitative and toxicity, these problems limit graphite electrode in PC base electrolyte, so as to ultimately limit lithium Ion battery application under cryogenic.
It is pointed out that the ceramic powder for typically being used is mainly inorganic oxide, there is great amount of hydroxy group in its surface Deng functional group, can be coupled by graft reaction and the material with electrochemical function, so as to realize the compound of function.Base In this, the present invention proposes to have in ceramic powder surface grafting first makes graphite that the film forming of SEI films is formed in PC base electrolyte Additives function group, and this ceramic powder through being grafted is dispersed in the matrix of polymer dielectric forms functional form and be polymerized Thing electrolyte.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of functional form of the lithium ion battery suitable for graphite cathode Polymer dielectric.
Another technical problem to be solved by this invention is to provide a kind of above-mentioned functions type polymer dielectric in lithium ion Application in battery.
To reach above-mentioned purpose, the technical solution adopted by the present invention is：
It is an object of the present invention to provide a kind of functional form polymer dielectric, including electrolyte matrix and propylene carbonate Ester group electrolyte (PC bases electrolyte), described electrolyte matrix includes polymeric matrix, and described electrolyte matrix also includes Be dispersed in the functionalization ceramic powder in described polymeric matrix, described functionalization ceramic powder by ceramic powder surface The film for additive functional group that being grafted with can make graphite that SEI films are formed in propylene carbonate ester group electrolyte is formed, described The general structure of film for additive functional group is：Wherein, X is the functional group containing unsaturated bond.
Preferably, the carbon number of described X is between 2~10.
Preferably, described unsaturated bond be carbon-carbon double bond, triple carbon-carbon bonds, C=O bond, the key of carbon nitrogen three, nitrogen nitrogen double bond, One or more in sulfur-to-oxygen double bond.
Preferably, described functional group be alkenyl, alkenylene, alkynyl, aldehyde radical, ester group, ketone group, cyano group, azo-compound, One or more in phenyl and phenyl substituent, sulfonyl.
It is further preferred that described X is selected from one or more in following structural formula,
Preferably, described ceramic powder is selected from silica, alundum (Al2O3), titanium dioxide, zirconium dioxide, oxidation One or more in zinc.
Preferably, the particle diameter of described ceramic powder is 5 nanometers~50 microns.For having for scattered uniformity and application Effect property, the particle diameter of described ceramic powder is more preferably 50 nanometers~10 microns
In the present invention, functionalization ceramic powder can be one or more combination of compound, and above-claimed cpd can be through One or more graft modification in described film for additive functional group is formed.
Preferably, described polymeric matrix be selected from polyethylene glycol oxide, acrylonitrile, polyacrylonitrile, azodiisobutyronitrile, It is methyl acrylate, polymethyl methacrylate, polytetrafluoroethylene (PTFE), vinylidene fluoride-hexafluoropropylene copolymer, polychloride vinyl, poly- The blending of vinylidene and above matrix or copolymerization system.
Preferably, described electrolyte matrix through described polymeric matrix and described functionalization ceramic powder dissolving or Dispersion forms solution in a solvent, and the described solvent that then will be volatilized after described solution coating obtains described electrolyte base Body, wherein, described solvent is the polar solvent of the polymeric matrix that can dissolve described.
According to an implementation method, described solvent is 1-Methyl-2-Pyrrolidone, DMF, acetone, One or more in n-butanol, acetonitrile polar solvent of combination.
According to an implementation method, the mass fraction of described polymeric matrix in described solution is 5wt.%- 30wt.%, preferably 10wt.%-20wt.%.
Preferably, described functionalization ceramic powder is 1wt.%- relative to the mass fraction of described polymeric matrix 50wt.%.
In the present invention, described functional form polymer dielectric is prepared by the conventional method of gel electrolyte, example Such as, electrolyte matrix immersion PC base electrolyte is obtained.
In the present invention, described PC base electrolyte refer to PC be solely or mainly solvent constitute electrolyte system, i.e., Can be the binary or Diversity of electrolyte, or PC using pure PC as solvent and EC, DEC, DMC, EMC equal solvent Solvent, wherein PC mass fraction in a solvent are 50%-99.5%, the main component of solvent are become, the purpose is to be The fusing point of whole electrolyte system is reduced, the temperature in use of electrolyte is reduced.The lithium salts dissolved in electrolyte is commercialization at present The electrolytic salt commonly used in electrolyte system, including lithium hexafluoro phosphate (LiPF6), lithium perchlorate (LiClO4), di-oxalate lithium borate (LiBC4O8, LiBOB), LiBF4 (LiBF4), trifluoromethyl sulfonic acid lithium (LiCF3SO3), tetraethyl ammonium tetrafluoroborate ((C2H5)4NBF4), two (trifluoromethane sulfonic acid acyl) imine lithium (LiN (CF3SO2)2), methyltriethylammonitetrafluoroborate tetrafluoroborate (CH3 (C2H5)3NBF4) etc..
It is a further object to provide a kind of described functional form polymer dielectric in lithium ion battery Using.
Specifically, described lithium ion battery uses graphite cathode.
Because above-mentioned technical proposal is used, the present invention has following advantages compared with prior art：
The present invention is by using functionalization ceramic powder so that graphite forms SEI films in PC base electrolyte, and PC is Main or exclusive solvents in electrolyte solvent so that the fusing point of electrolyte system is greatly lowered, thus, using work(of the invention The lithium ion battery of energy type polymer dielectric assembling has preferable cryogenic property.
Brief description of the drawings
Fig. 1 is cycle performance curve of the graphite electrode in using the polymer dielectric obtained by embodiment 1, comparative example.
Fig. 2 is that graphite electrode circulates the scanning after 20 times in using the functional form polymer dielectric of the gained of embodiment 1 Electromicroscopic photograph.
Fig. 3 is that graphite electrode circulates the FT-IR after 20 times in using the functional form polymer dielectric of the gained of embodiment 1 Spectrogram.
Specific embodiment
With reference to embodiment in detail the application is described in detail, but the application is not limited to these embodiments.
Embodiment 1
The preparation of functional form ceramic powder：Take 0.5 gram to have water-wetted surface, particle diameter is the nano-TiO of 5-8nm2, it is distributed to In 100 milliliters of toluene, ultrasonic disperse under mechanical agitation, is slowly added to 2 milliliters of methoxy-ethylene base imidazoles after 30 minutes After (structural formula is as follows), 80 DEG C are warmed up to, continue to react 6 hours, the white emulsion of gained is centrifuged, and the white for obtaining is consolidated Body deionized water and absolute ethyl alcohol are washed three times respectively, are dried under 60 DEG C of vacuum conditions, as functional form nano-TiO2。
The preparation of functional form polymer dielectric：By 0.1 gram of functional form nano-TiO29 grams of concentration are added to for 10wt.% Kynoar DMF solution in, stirring 1 hour after, polymer solution is applied on glass plate, Solvent flashing.By polymer solids film immersion electrolyte (1mol/l LiPF6, solvent is pure PC) and after 10 minutes, obtain functional form Polymer dielectric.
The preparation of graphite electrode：By a certain amount of MCMB graphite cathode material (CMS), conductive agent acetylene black and After binding agent Kynoar (PVDF) is ground according to a certain percentage, a certain amount of 1-METHYLPYRROLIDONE (NMP) is added, Uniform slurry is obtained, is coated on Copper Foil and is dried 12 hours under 120 DEG C of vacuum conditions, cathode pole piece is obtained after rolling.
Cycle performance of lithium ion battery is tested：It is electric as research using graphite electrode using stainless steel cylinder simulated battery Pole, using lithium metal as to electrode, using obtained functional form polymer dielectric as barrier film and electrolyte, by battery mould, After barrier film is dried, simulated battery is assembled into glove box.The voltage range of discharge and recharge is 0.001-2V (relative to Li/Li+), Charge-discharge velocity is 0.2C.Shown in gained cycle performance curve such as Fig. 1 (▲).Discharge capacity is 208.2mAh/g, 20 times first After circulation, discharge capacity is 194.6mAh/g, and capability retention is 93.5%.Illustrate graphite electrode in functional form polymer electrolytic There is preferable cycle performance in matter.
Microscopic appearance and FT-IR are tested：Take simulated battery apart in glove box, will circulate 20 times graphite cathode material from Stripped down on Copper Foil, it is, rapid respectively after DMC is volatilized completely under vacuum with the DMC eluent solvents of LITHIUM BATTERY several times Being put into scanning electron microscope example room and infrared spectrometer carries out microscopic appearance test and FT-IR tests.Ball as can see from Figure 2 Skin covering of the surface of the CMS surfaces of shape by one layer of densification is covered, and this layer of surface film is by functional ceramic powder surface modification The SEI films that are decomposed to form on CMS surfaces of additive, it can effectively suppress the decomposition of PC solvent molecules and embedding altogether, make stone Ink material can have normal chemical property in PC base electrolyte.FT-IR test results (Fig. 3) are then decomposed to additive The infrared absorption peak of lithium alkylide and lithium carbonate is belonged in the SEI films of formation, it is thus identified that the shape of graphite electrode surface SEI Into.
Embodiment 2
Take the Al that 0.5 gram particle footpath is 50nm2O3, it is distributed in 100 milliliters of benzene, ultrasonic disperse 1 hour, in mechanical agitation bar Under part, 0.5 milliliter of methoxyl group N- allyl imidazoles (structural formula is as follows) is added, be warming up to 120 DEG C, 2 are reacted under reflux conditions Individual hour, the white emulsion centrifugation of gained, the solid deionized water and absolute ethyl alcohol for obtaining be respectively washed three times after Dried under 60 DEG C of vacuum conditions to constant weight, as functional form Al2O3.By the functional form Al of gained2O3It is distributed to poly- inclined containing 1 gram In the copolymer of PVF-hexafluoropropene, 1 milliliter of n-butanol and 6 milliliters of solution of acetone, solution is stirred in confined conditions Uniformly, the rapid casting film-forming on cleaned glass plate, in atmosphere after film forming, is placed in vacuum drying oven and thoroughly removes solvent, institute The polymer film for obtaining can be used as the matrix of composite polymer electrolyte.The present embodiment is to be received containing modified by phase inversion Microcellular structure is constructed in the polymeric system of rice filler, the method for microcellular structure is constructed also including solvent extraction process, Electrospinning Method etc..
Embodiment 3
Take the TiO that 0.5 gram particle footpath is 10nm2It is distributed in 100 milliliters of benzene, 0.1 gram of methoxyl group is added under ultrasound condition To Methyl benzenesulfonyl imidazoles (structural formula below figure), and reacted 1 hour, the white emulsion of gained under room temperature and ultrasound condition Washes of absolute alcohol is used after being centrifuged 3 times, dried to constant weight under 80 DEG C of vacuum conditions.The white solid of gained is function Type TiO2.Take 0.1 gram of above-mentioned functions type TiO2It is distributed to polyacrylonitrile-methyl acrylate copolymer that 8 gram mass fractions are 5% In the acetonitrile solution of (P (AN-MMA)), 2 hours are stirred, the uniform viscous solution of gained is coated on cleaned glass plate, flowed Prolong film forming, the polymer film of gained can be used as the base of organic-inorganic polymer dielectric after solvent flashing under the conditions of 60 DEG C Body.
Embodiment 4
It is the Nano-meter SiO_2 of 20nm to take 1 gram of particle diameter as obtained in hydrolysis of alkoxide2, it is distributed in 100 milliliters of toluene, ultrasound point After dissipating 30 minutes, under mechanical agitation, after adding 0.2 milliliter of methoxyl group acetyl imidazole (structural formula below figure), it is warmed up to 80 DEG C, continue to react 12 hours, the white emulsion centrifugation of gained, the white solid deionized water and absolute ethyl alcohol for obtaining Wash three times respectively, dried under 60 DEG C of vacuum conditions to constant weight, as functional form SiO2.Take 1 gram of above-mentioned modified Nano SiO2、9 Gram acrylonitrile (AN), 0.09 gram of azodiisobutyronitrile (AIBN) and 30 milliliters of N,N-dimethylformamides (DMF) are distributed to and are equipped with In 100 milliliters of three-neck flasks of mechanical stirring device, nitrogen protection device and reflux condensing tube, ultrasonic disperse leads to nitrogen after 2 hours Gas is warming up to 60 DEG C after 0.5 hour, stir 24 hours, and the viscous solution of gained is coated on the polyfluortetraethylene plate of cleaning, stream Prolong after film forming the solvent flashing under the conditions of 60 DEG C, the polymer film of gained can be used as the matrix of polymer dielectric.This implementation Example is to carry out in-situ polymerization on modified Nano filling surface to prepare composite polymer electrolyte.Polymerization system can also be two kinds or The copolymerization system of various of monomer.
Comparative example
Take 0.5 gram to have water-wetted surface, particle diameter is the nano-TiO of 5-8nm2It is the poly- inclined of 10wt.% to be added to 9 grams of concentration In the DMF solution of PVF, after stirring 1 hour, polymer solution is applied on glass plate, volatilized molten Agent.By polymer solids film immersion electrolyte (1mol/l LiPF6, solvent is pure PC) and after 10 minutes, obtain the poly- of nonfunctional Polymer electrolyte.
The cycle performance of CMS graphite electrodes is studied as electrolyte using it.The preparation of graphite electrode and lithium ion The test of cycle performance of battery such as embodiment 1.Shown in cycle performance curve such as Fig. 1 (●), because PC electrolyte discharges first During decomposed on the surface of graphite electrode, it is impossible to form fine and close, effective SEI films, solvation Li occur+Constantly altogether It is embedding, the stripping of graphite electrode is ultimately resulted in, there is efflorescence, discharge and recharge is normally carried out so as to be unable to graphite electrode, it is subsequently put Capacitance is almost 0.
The above embodiments merely illustrate the technical concept and features of the present invention, its object is to allow person skilled in the art Scholar will appreciate that present disclosure and implement according to this that it is not intended to limit the scope of the present invention, all according to the present invention The equivalent change or modification that Spirit Essence is made, should all be included within the scope of the present invention.

Claims (12)

1. a kind of functional form polymer dielectric, including electrolyte matrix and propylene carbonate ester group electrolyte, described electrolyte Matrix includes polymeric matrix, it is characterised in that：Described electrolyte matrix also includes being dispersed in described polymeric matrix Functionalization ceramic powder, described functionalization ceramic powder is had by the surface grafting of ceramic powder can make graphite in carbonic acid third The film for additive functional group that SEI films are formed in alkene ester group electrolyte is formed, and the structure of described film for additive functional group is led to Formula is：Wherein, X is the functional group containing unsaturated bond.
2. functional form polymer dielectric according to claim 1, it is characterised in that：The carbon number of described X 2~ Between 10.
3. functional form polymer dielectric according to claim 1, it is characterised in that：Described unsaturated bond is double carbon carbon One or more in key, triple carbon-carbon bonds, C=O bond, the key of carbon nitrogen three, nitrogen nitrogen double bond, sulfur-to-oxygen double bond.
4. functional form polymer dielectric according to claim 1, it is characterised in that：Described functional group is alkenyl, Asia One kind or many in alkenyl, alkynyl, aldehyde radical, ester group, ketone group, cyano group, azo-compound, phenyl and phenyl substituent, sulfonyl Kind.
5. functional form polymer dielectric according to any one of claim 1 to 4, it is characterised in that：Described X is choosing One or more from following structural formula,
6. functional form polymer dielectric according to claim 1, it is characterised in that：Described ceramic powder is selected from two One or more in silica, alundum (Al2O3), titanium dioxide, zirconium dioxide, zinc oxide.
7. the functional form polymer dielectric according to claim 1 or 6, it is characterised in that：The grain of described ceramic powder Footpath is 5 nanometers~50 microns.
8. functional form polymer dielectric according to claim 1, it is characterised in that：Described polymeric matrix be selected from Polyethylene glycol oxide, acrylonitrile, polyacrylonitrile, azodiisobutyronitrile, methyl acrylate, polymethyl methacrylate, polytetrafluoroethyl-ne Blending or the copolymerization system of alkene, vinylidene fluoride-hexafluoropropylene copolymer, polychloride vinyl, Kynoar and above matrix.
9. functional form polymer dielectric according to claim 1, it is characterised in that：Described electrolyte matrix is through described Polymeric matrix and described functionalization ceramic powder be dissolved or dispersed in solvent in form solution, then by described solution The described solvent that volatilized after coating obtains described electrolyte matrix, wherein, described solvent is that can dissolve described polymerization The polar solvent of thing matrix.
10. the functional form polymer dielectric according to claim 1 or 9, it is characterised in that：Described functionalization ceramic powder Body phase is 1wt.%-50wt.% for the mass fraction of described polymeric matrix.
A kind of 11. functional form polymer dielectrics as any one of claim 1 to 10 answering in lithium ion battery With.
12. applications according to claim 11, it is characterised in that：Described lithium ion battery uses graphite cathode.
CN201710299256.0A 2017-04-28 2017-04-28 A kind of functional form polymer dielectric and its application in lithium ion battery Pending CN106935906A (en)

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CN114854018A (en) * 2022-06-07 2022-08-05 福建师范大学 Polymeric sulfur material and application thereof in preparation of lithium-sulfur battery
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CN110911747B (en) * 2019-11-29 2021-06-08 桑德新能源技术开发有限公司 Electrolyte additive, electrolyte and lithium ion battery
CN114854018A (en) * 2022-06-07 2022-08-05 福建师范大学 Polymeric sulfur material and application thereof in preparation of lithium-sulfur battery
CN114854018B (en) * 2022-06-07 2023-10-27 福建师范大学 Polymeric sulfur material and application thereof in preparation of lithium sulfur battery
CN117525574A (en) * 2024-01-03 2024-02-06 河北工程大学 Organic-inorganic co-modified PEO solid electrolyte and preparation method thereof
CN117525574B (en) * 2024-01-03 2024-03-22 河北工程大学 Organic-inorganic co-modified PEO solid electrolyte and preparation method thereof

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Application publication date: 20170707