CN108682863A - A kind of lithium battery gel-form solid polymer electrolyte - Google Patents
A kind of lithium battery gel-form solid polymer electrolyte Download PDFInfo
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- CN108682863A CN108682863A CN201810593201.5A CN201810593201A CN108682863A CN 108682863 A CN108682863 A CN 108682863A CN 201810593201 A CN201810593201 A CN 201810593201A CN 108682863 A CN108682863 A CN 108682863A
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- polyacrylonitrile
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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
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M4/621—Binders
- H01M4/622—Binders being polymers
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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
Abstract
The invention discloses a kind of lithium battery gel-form solid polymer electrolytes, belong to new energy battery material technical field.The lithium battery gel-form solid polymer electrolyte that the present invention develops includes Complex polymer, plasticizer and lithium salts electrolyte are constituted, in preparation process, first will be polyacrylonitrile hydrolyzed, then the polyacrylonitrile after hydrolysis is acidified with strong acid, after being then acidified polyacrylonitrile dissolving, thionyl chloride is added, after heating reaction, recycling design obtains modified hydrolyzed polyacrylonitrile；It is again 3 in mass ratio by modified hydrolyzed polyacrylonitrile and more aldehyde sodium alginates：1~5：1 compounding, obtains Complex polymer；After then mixing Complex polymer and plasticizer, heating stirring reaction adds lithium salts electrolyte, after being uniformly mixed, is film-made to get lithium battery gel-form solid polymer electrolyte.Gained lithium battery gel-form solid polymer electrolyte of the invention has excellent conductivity.
Description
Technical field
The invention discloses a kind of lithium battery gel-form solid polymer electrolytes, belong to new energy battery material technical field.
Background technology
Lithium ion battery because high with operating voltage, energy density is big, memory-less effect, have extended cycle life with it is pollution-free etc.
Advantage becomes main force's power supply of each electronic product, and as the research and development of secondary cell in the world today and applies hot spot.Lithium from
Sub- battery is made of positive and negative electrode, electrolyte and membrane for polymer, and diaphragm is that technical barrier is highest a kind of high in lithium electric material
Added value material accounts for the 20%~30% of lithium battery cost.
It, can be to avoid conventional liquid lithium ion using polymer dielectric compared with the system of traditional diaphragm+electrolyte
The leakage problem of battery, improves the security performance and energy density of battery, and can realize the slimming, lighting and shape of battery
The advantages that variable.The gel electrolyte that we say is made of diaphragm and electrolyte.Make the polymer dielectric of lithium battery
The following conditions must be met：
（1）Room temperature and there should be relatively high ionic conductivity less than room temperature；
（2）Good mechanical performance；
（3）Thermal stability and electrochemical stability；
（4）Reliable cycle-index；
（5）There is preferable compatibility with electrode.Polymer dielectric should be able to bear the presence of low-temperature circulating and in battery work
Make the pressure gradually risen in the process.
Polymer dielectric can be divided into pure polymer electrolyte [solid polymer electrolyte（SPE）], colloidal polymer electricity
Xie Zhi（GPE）And porous polymer electrolyte（PPE）.Pure polymer electrolyte is relatively low due to room-temperature conductivity, it is difficult to be commercialized.
Colloidal polymer electrolyte using the liquid electrolyte molecule that is fixed in the polymer network with suitable micro-structure realize from
Son conduction, the stability with solid polymer, and the high ion conductivity with liquid electrolyte, show good application
Foreground.Porous polymer electrolyte, which refers to polymer body, has microcellular structure, and plasticizer and salt are present in polymer body hole
In shape structure.Gel polymer electrolyte is a kind of polymer dielectric of similar gels property after liquid plasticizer is added, and
Full solid state polymer electrolyte is compared, the liquid flux containing small-molecular-weight in system.Lithium cell electrolyte traditional at present is also
There are problems that conductivity can not further increase, therefore also needs to study it.
Invention content
The present invention solves the technical problem of：It can not be further increased for traditional lithium cell electrolyte conductivity
Problem provides a kind of lithium battery gel-form solid polymer electrolyte.
In order to solve the above-mentioned technical problem, the technical solution adopted in the present invention is：
A kind of lithium battery gel-form solid polymer electrolyte, includes the raw material of following parts by weight：
20~30 parts of Complex polymer
55~75 parts of plasticizer
8~15 parts of lithium salts electrolyte
The preparation process of the lithium battery gel-form solid polymer electrolyte is：
（1）Polyacrylonitrile and lye are mixed, and in ozone atmosphere, heating hydrolysis obtains hydrolyzed polyacrylonitrile；
（2）Hydrolyzed polyacrylonitrile is acidified with strong acid, obtains acidification hydrolization polyacrylonitrile；
（3）After acidification hydrolization polyacrylonitrile is dissolved in solvent, thionyl chloride is added, after heating reaction, recycling design obtains
Modified hydrolyzed polyacrylonitrile；
（4）It is 3 in mass ratio by modified hydrolyzed polyacrylonitrile and more aldehyde sodium alginates：1~5：1 compounding, obtains Complex polymer；
（5）After Complex polymer and plasticizer are mixed, heating stirring reaction adds lithium salts electrolyte, is uniformly mixed
Afterwards, film is to get lithium battery gel-form solid polymer electrolyte.
The plasticizer is that Epoxy oil acid esters and dimethyl carbonate are 1 in mass ratio：1~10：1 mixes.
The lithium salts electrolyte is LiClO4, LiCF3SO3Or LiPF6In any one.
Step（3）The solvent is arbitrary in dimethylformamide, dimethyl sulfoxide (DMSO), sulfolane or nitric acid ethylidene ester
It is a kind of.
Step（1）The lye is the aqueous slkali that mass fraction is 15~30%；The alkali is lithium hydroxide, sodium hydroxide
Or any one in potassium hydroxide.
Step（2）The strong acid is the acid solution that mass fraction is 8~10%；The acid is hydrochloric acid, in sulfuric acid or nitric acid
Any one.
The beneficial effects of the invention are as follows：
Technical solution of the present invention first hydrolyzes polyacrylonitrile and lye under oxidative environment, in hydrolytic process, on the one hand,
Portion fractures occur for the macromolecular chain of polyacrylonitrile, its molecular weight is made to reduce, and to reach inhibition polymer crystallization, increase polymer
Segment randomness improves product conductivity；On the other hand, in polyacrylonitrile molecule structure cyano moiety be changed into amide groups and
Carboxyl improves its dissolubility to change polyacrylonitrile property, during subsequent reactions, under the action of thionyl chloride, makes
Moieties form acyl chlorides structure in acidification hydrolization polyacrylonitrile molecule structure, and acid chloride groups reactivity is high, is conducive to be modified
Hydrolyzed polyacrylonitrile and more aldehyde sodium alginates new chemical bonding is formed in subsequent preparation process, to both make effectively
In conjunction with organic whole is formed, the mechanical strength of film is made effectively to be promoted, and the formation of chemical bond, it is also beneficial to gel skeleton
Stability further increases, furthermore, it can also play the role of improving gel electrolyte and describing property of lithium battery, make product can
It is widely used in lithium battery.
Specific implementation mode
It is 1 in mass ratio：10~1：The aqueous slkali mixing that polyacrylonitrile and mass fraction are 15~30% is poured into reaction by 20
In kettle, and ozone is passed through into reaction kettle with 60~80mL/min rates, then in ozone atmosphere, in temperature be 95~100
DEG C, under the conditions of rotating speed is 400~500r/min, heating stirring hydrolyzes 4~6h, waits for material in reactor cooled to room temperature,
Filtering, obtain filter residue, and filter residue is washed with deionized 4~6 times, then the filter residue after washing is transferred in baking oven, in temperature be 75
It is dried to constant weight under the conditions of~80 DEG C, obtains dry filter residue, as hydrolyzed polyacrylonitrile；It is 1 in mass ratio：8~1：10 will hydrolysis
The acid solution mixing that polyacrylonitrile and mass fraction are 8~10% is poured into three-necked flask, then three-necked flask immigration digital display is tested the speed
In constant temperature blender with magnetic force, in temperature be 55~65 DEG C, rotating speed be 300~400r/min under the conditions of, constant temperature stirring acidification 45~
After 60min, filtering obtains filter cake, and gained filter cake is washed with deionized 4~6 times, then the filter cake after washing is transferred to baking oven
In, it is dry to constant weight under the conditions of temperature is 75~85 DEG C, obtain dry cake, as acidification hydrolization polyacrylonitrile；In mass ratio
It is 1：10~1：After 15 are dissolved in acidification hydrolization polyacrylonitrile in solvent, add acidification hydrolization polyacrylonitrile quality 0.6~
0.8 times of thionyl chloride is then 75~80 DEG C in temperature, and under the conditions of rotating speed is 600~800r/min, heating stirring reacts 3
After~5h, vacuum distillation recovered solvent obtains modified hydrolyzed polyacrylonitrile；It is 1 in mass ratio by sodium alginate and water：8~1：10
After mixing, swelling 8~for 24 hours is stood, then the high iodine of 0.1~0.2 times of sodium alginate quality is added into the sodium alginate after swelling
Sour sodium is then 75~80 DEG C in temperature, and under the conditions of rotating speed is 400~600r/min, constant temperature is stirred to react 2~3h, then through dense
Contracting is dried, much aldehyde sodium alginate；It is 3 in mass ratio by more aldehyde sodium alginates and modified hydrolyzed polyacrylonitrile：1~5：1
Compounding, obtains Complex polymer；It counts in parts by weight, takes 20~30 parts of Complex polymers successively, 55~75 parts of plasticizer, 8~15
Complex polymer and plasticizer are first mixed and are poured into reactant, be 80~85 DEG C in temperature, rotating speed is by part lithium salts electrolyte
Under the conditions of 800~1200r/min, after heating stirring reacts 3~5h, lithium salts electrolyte is added, continues to be stirred 1~3h
Afterwards, it discharges, is film-made to get lithium battery gel-form solid polymer electrolyte.The plasticizer is that Epoxy oil acid esters and dimethyl carbonate are pressed
Mass ratio is 1：1~10：1 mixes.The lithium salts electrolyte is LiClO4, LiCF3SO3Or LiPF6In any one.
The solvent is any one in dimethylformamide, dimethyl sulfoxide (DMSO), sulfolane or nitric acid ethylidene ester.The alkali is hydrogen
Any one in lithia, sodium hydroxide or potassium hydroxide.The acid is hydrochloric acid, any one in sulfuric acid or nitric acid.
It is 1 in mass ratio：20 pour into the aqueous slkali mixing that polyacrylonitrile and mass fraction are 30% in reaction kettle, and with
80mL/min rates are passed through ozone into reaction kettle, then in ozone atmosphere, in temperature be 100 DEG C, rotating speed 500r/min
Under the conditions of, heating stirring hydrolyzes 6h, waits for material in reactor cooled to room temperature, filters, obtains filter residue, and be washed with deionized water
It washs filter residue 6 times, then the filter residue after washing is transferred in baking oven, dried to constant weight under the conditions of being 80 DEG C in temperature, obtain dry filter residue,
As hydrolyzed polyacrylonitrile；It is 1 in mass ratio：10 pour into the acid solution mixing that hydrolyzed polyacrylonitrile and mass fraction are 10%
In three-necked flask, then three-necked flask immigration digital display tested the speed in constant temperature blender with magnetic force, in temperature be 65 DEG C, rotating speed 400r/
Under the conditions of min, after constant temperature stirring acidification 60min, filtering obtains filter cake, and gained filter cake is washed with deionized 6 times, then will wash
Filter cake after washing is transferred in baking oven, dry to constant weight under the conditions of temperature is 85 DEG C, obtains dry cake, as acidifying water depolymerization
Acrylonitrile；It is 1 in mass ratio：After 15 are dissolved in acidification hydrolization polyacrylonitrile in solvent, acidification hydrolization polyacrylonitrile is added
The thionyl chloride that 0.8 times of quality is then 80 DEG C in temperature, under the conditions of rotating speed is 800r/min, after heating stirring reacts 5h, subtracts
Pressure is distilled to recover solvent, obtains modified hydrolyzed polyacrylonitrile；It is 1 in mass ratio by sodium alginate and water：After 10 mixing, swelling is stood
For 24 hours, then into the sodium alginate after swelling the sodium metaperiodate of 0.2 times of sodium alginate quality is added, is then 80 DEG C in temperature, turns
Under the conditions of speed is 600r/min, constant temperature is stirred to react 3h, then concentrated, dry, much aldehyde sodium alginate；By more aldehyde radical seaweed
Sour sodium and modified hydrolyzed polyacrylonitrile are 5 in mass ratio：1 compounding, obtains Complex polymer；It counts in parts by weight, takes 30 parts successively
Complex polymer and plasticizer are first mixed and are poured into reactant by Complex polymer, 75 parts of plasticizer, 15 parts of lithium salts electrolyte,
It is 85 DEG C in temperature, under the conditions of rotating speed is 1200r/min, after heating stirring reacts 5h, adds lithium salts electrolyte, continue to stir
After mixing 3h, discharging is film-made to get lithium battery gel-form solid polymer electrolyte.The plasticizer is Epoxy oil acid esters and carbonic acid two
Methyl esters is 10 in mass ratio：1 mixes.The lithium salts electrolyte is LiClO4.The solvent is dimethylformamide.It is described
Alkali is lithium hydroxide.The acid is hydrochloric acid.
It is 1 in mass ratio：After 15 are dissolved in polyacrylonitrile in solvent, the chlorination of 0.8 times of polyacrylonitrile quality is added
Sulfoxide, then in temperature be 80 DEG C, rotating speed be 800r/min under the conditions of, heating stirring react 5h after, vacuum distillation recovered solvent,
Obtain modified hydrolyzed polyacrylonitrile；It is 1 in mass ratio by sodium alginate and water：After 10 mixing, swelling is stood for 24 hours, then to after swelling
Sodium alginate in the sodium metaperiodate of 0.2 times of sodium alginate quality is added, be then 80 DEG C in temperature, rotating speed is 600r/min items
Under part, constant temperature is stirred to react 3h, then concentrated, dry, much aldehyde sodium alginate；By more aldehyde sodium alginates and modified hydrolyzed
Polyacrylonitrile is 5 in mass ratio：1 compounding, obtains Complex polymer；It counts in parts by weight, takes 30 parts of Complex polymers successively, 75 parts
Complex polymer and plasticizer are first mixed and are poured into reactant by plasticizer, 15 parts of lithium salts electrolyte, are 85 DEG C in temperature, are turned
Under the conditions of speed is 1200r/min, after heating stirring reacts 5h, lithium salts electrolyte is added, is continued after being stirred 3h, discharged,
Film is to get lithium battery gel-form solid polymer electrolyte.The plasticizer is Epoxy oil acid esters and dimethyl carbonate is in mass ratio
10：1 mixes.The lithium salts electrolyte is LiClO4.The solvent is dimethylformamide.The alkali is lithium hydroxide.
The acid is hydrochloric acid.
It is 1 in mass ratio：20 pour into the aqueous slkali mixing that polyacrylonitrile and mass fraction are 30% in reaction kettle, and with
80mL/min rates are passed through ozone into reaction kettle, then in ozone atmosphere, in temperature be 100 DEG C, rotating speed 500r/min
Under the conditions of, heating stirring hydrolyzes 6h, waits for material in reactor cooled to room temperature, filters, obtains filter residue, and be washed with deionized water
It washs filter residue 6 times, then the filter residue after washing is transferred in baking oven, dried to constant weight under the conditions of being 80 DEG C in temperature, obtain dry filter residue,
As hydrolyzed polyacrylonitrile；It is 1 in mass ratio：10 pour into the acid solution mixing that hydrolyzed polyacrylonitrile and mass fraction are 10%
In three-necked flask, then three-necked flask immigration digital display tested the speed in constant temperature blender with magnetic force, in temperature be 65 DEG C, rotating speed 400r/
Under the conditions of min, after constant temperature stirring acidification 60min, filtering obtains filter cake, and gained filter cake is washed with deionized 6 times, then will wash
Filter cake after washing is transferred in baking oven, dry to constant weight under the conditions of temperature is 85 DEG C, obtains dry cake, as acidifying water depolymerization
Acrylonitrile；It is 1 in mass ratio by sodium alginate and water：After 10 mixing, swelling is stood for 24 hours, then into the sodium alginate after swelling
The sodium metaperiodate of 0.2 times of sodium alginate quality is added, is then 80 DEG C in temperature, under the conditions of rotating speed is 600r/min, constant temperature stirs
Reaction 3h is mixed, then concentrated, dried, much aldehyde sodium alginate；More aldehyde sodium alginates and acidification hydrolization polyacrylonitrile are pressed
Mass ratio is 5：1 compounding, obtains Complex polymer；It counts in parts by weight, takes 30 parts of Complex polymers successively, 75 parts of plasticizer, 15
Complex polymer and plasticizer are first mixed and are poured into reactant by part lithium salts electrolyte, in temperature be 85 DEG C, rotating speed 1200r/
Under the conditions of min, after heating stirring reacts 5h, lithium salts electrolyte is added, is continued after being stirred 3h, discharged, is film-made to get lithium
Battery polymer gel electrolyte.The plasticizer is that Epoxy oil acid esters and dimethyl carbonate are 10 in mass ratio：1 mixing and
At.The lithium salts electrolyte is LiClO4.The solvent is dimethylformamide.The alkali is lithium hydroxide.The acid is salt
Acid.
It is 1 in mass ratio：20 pour into the aqueous slkali mixing that polyacrylonitrile and mass fraction are 30% in reaction kettle, and with
80mL/min rates are passed through ozone into reaction kettle, then in ozone atmosphere, in temperature be 100 DEG C, rotating speed 500r/min
Under the conditions of, heating stirring hydrolyzes 6h, waits for material in reactor cooled to room temperature, filters, obtains filter residue, and be washed with deionized water
It washs filter residue 6 times, then the filter residue after washing is transferred in baking oven, dried to constant weight under the conditions of being 80 DEG C in temperature, obtain dry filter residue,
As hydrolyzed polyacrylonitrile；It is 1 in mass ratio：10 pour into the acid solution mixing that hydrolyzed polyacrylonitrile and mass fraction are 10%
In three-necked flask, then three-necked flask immigration digital display tested the speed in constant temperature blender with magnetic force, in temperature be 65 DEG C, rotating speed 400r/
Under the conditions of min, after constant temperature stirring acidification 60min, filtering obtains filter cake, and gained filter cake is washed with deionized 6 times, then will wash
Filter cake after washing is transferred in baking oven, dry to constant weight under the conditions of temperature is 85 DEG C, obtains dry cake, as acidifying water depolymerization
Acrylonitrile；It is 1 in mass ratio：After 15 are dissolved in acidification hydrolization polyacrylonitrile in solvent, acidification hydrolization polyacrylonitrile is added
The thionyl chloride that 0.8 times of quality is then 80 DEG C in temperature, under the conditions of rotating speed is 800r/min, after heating stirring reacts 5h, subtracts
Pressure is distilled to recover solvent, obtains modified hydrolyzed polyacrylonitrile；It is 5 in mass ratio by sodium alginate and modified hydrolyzed polyacrylonitrile：1 is multiple
Match, obtains Complex polymer；It counts in parts by weight, takes 30 parts of Complex polymers successively, 75 parts of plasticizer, 15 parts of lithium salts electrolyte,
First Complex polymer and plasticizer are mixed and poured into reactant, is 85 DEG C in temperature, under the conditions of rotating speed is 1200r/min, adds
After 5h is reacted in thermal agitation, lithium salts electrolyte is added, is continued after being stirred 3h, discharged, film is solidifying to get lithium battery polymer
Glue electrolyte.The plasticizer is that Epoxy oil acid esters and dimethyl carbonate are 10 in mass ratio：1 mixes.The lithium salts electricity
Solution matter is LiClO4.The solvent is dimethylformamide.The alkali is lithium hydroxide.The acid is hydrochloric acid.
It is 1 in mass ratio：20 pour into the aqueous slkali mixing that polyacrylonitrile and mass fraction are 30% in reaction kettle, and with
80mL/min rates are passed through ozone into reaction kettle, then in ozone atmosphere, in temperature be 100 DEG C, rotating speed 500r/min
Under the conditions of, heating stirring hydrolyzes 6h, waits for material in reactor cooled to room temperature, filters, obtains filter residue, and be washed with deionized water
It washs filter residue 6 times, then the filter residue after washing is transferred in baking oven, dried to constant weight under the conditions of being 80 DEG C in temperature, obtain dry filter residue,
As hydrolyzed polyacrylonitrile；It is 1 in mass ratio：10 pour into the acid solution mixing that hydrolyzed polyacrylonitrile and mass fraction are 10%
In three-necked flask, then three-necked flask immigration digital display tested the speed in constant temperature blender with magnetic force, in temperature be 65 DEG C, rotating speed 400r/
Under the conditions of min, after constant temperature stirring acidification 60min, filtering obtains filter cake, and gained filter cake is washed with deionized 6 times, then will wash
Filter cake after washing is transferred in baking oven, dry to constant weight under the conditions of temperature is 85 DEG C, obtains dry cake, as acidifying water depolymerization
Acrylonitrile；It is 1 in mass ratio：After 15 are dissolved in acidification hydrolization polyacrylonitrile in solvent, acidification hydrolization polyacrylonitrile is added
The thionyl chloride that 0.8 times of quality is then 80 DEG C in temperature, under the conditions of rotating speed is 800r/min, after heating stirring reacts 5h, subtracts
Pressure is distilled to recover solvent, obtains modified hydrolyzed polyacrylonitrile；It counts in parts by weight, takes 30 parts of modified hydrolyzed polyacrylonitrile successively, 75
Complex polymer and plasticizer are first mixed and are poured into reactant by part plasticizer, 15 parts of lithium salts electrolyte, in temperature be 85 DEG C,
Under the conditions of rotating speed is 1200r/min, after heating stirring reacts 5h, lithium salts electrolyte is added, continues after being stirred 3h, goes out
Material is film-made to get lithium battery gel-form solid polymer electrolyte.The plasticizer be Epoxy oil acid esters and dimethyl carbonate in mass ratio
It is 10：1 mixes.The lithium salts electrolyte is LiClO4.The solvent is dimethylformamide.The alkali is hydroxide
Lithium.The acid is hydrochloric acid.
Comparative example：The lithium cell electrolyte of Shanghai New Energy Technology Co., Ltd. production.
1 to 5 gained electrolyte of example and comparative example product are subjected to performance detection, specific detection method is as follows：
The conductivity of above-mentioned electrolyte is detected, specific testing result is as shown in table 1：
Table 1：Performance detection table
| Detection content | Example 1 | Example 2 | Example 3 | Example 4 | Example 5 | Comparative example |
| Conductivity/S/cm | 6.0×10-3 | 4.1×10-3 | 3.5×10-3 | 4.0×10-3 | 3.8×10-3 | 2.2×10-3 |
By 1 testing result of table it is found that present invention gained lithium battery gel-form solid polymer electrolyte has excellent conductivity.
Claims (6)
1. a kind of lithium battery gel-form solid polymer electrolyte, which is characterized in that include the raw material of following parts by weight：
20~30 parts of Complex polymer
55~75 parts of plasticizer
8~15 parts of lithium salts electrolyte
The preparation process of the lithium battery gel-form solid polymer electrolyte is：
（1）Polyacrylonitrile and lye are mixed, and in ozone atmosphere, heating hydrolysis obtains hydrolyzed polyacrylonitrile；
（2）Hydrolyzed polyacrylonitrile is acidified with strong acid, obtains acidification hydrolization polyacrylonitrile；
（3）After acidification hydrolization polyacrylonitrile is dissolved in solvent, thionyl chloride is added, after heating reaction, recycling design obtains
Modified hydrolyzed polyacrylonitrile；
（4）It is 3 in mass ratio by modified hydrolyzed polyacrylonitrile and more aldehyde sodium alginates：1~5：1 compounding, obtains Complex polymer；
（5）After Complex polymer and plasticizer are mixed, heating stirring reaction adds lithium salts electrolyte, is uniformly mixed
Afterwards, film is to get lithium battery gel-form solid polymer electrolyte.
2. a kind of lithium battery gel-form solid polymer electrolyte according to claim 1, which is characterized in that the plasticizer is ring
Oxygen oleate and dimethyl carbonate are 1 in mass ratio：1~10：1 mixes.
3. a kind of lithium battery gel-form solid polymer electrolyte according to claim 1, which is characterized in that the lithium salts electrolyte
For LiClO4, LiCF3SO3Or LiPF6In any one.
4. a kind of lithium battery gel-form solid polymer electrolyte according to claim 1, which is characterized in that step（3）It is described molten
Agent is any one in dimethylformamide, dimethyl sulfoxide (DMSO), sulfolane or nitric acid ethylidene ester.
5. a kind of lithium battery gel-form solid polymer electrolyte according to claim 1, which is characterized in that step（1）The alkali
Liquid is the aqueous slkali that mass fraction is 15~30%；The alkali is lithium hydroxide, any one in sodium hydroxide or potassium hydroxide
Kind.
6. a kind of lithium battery gel-form solid polymer electrolyte according to claim 1, which is characterized in that step（2）It is described strong
Acid is the acid solution that mass fraction is 8~10%；The acid is hydrochloric acid, any one in sulfuric acid or nitric acid.
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| CN115064697A (en) * | 2022-07-14 | 2022-09-16 | 中国科学院山西煤炭化学研究所 | Application of modified polyacrylonitrile, binder, negative plate and lithium ion battery |
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