Biodegradable composite polymer electrolyte for lithium battery and preparation method thereof

A composite polymer and biodegradation technology, applied in the field of composite polymer electrolyte and its preparation, can solve the problem of polymer refractory degradation, and achieve the effects of simple and easy process, high electrical conductivity and mechanical strength, and fast degradation.

Active Publication Date: 2019-11-08
HENAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a biodegradable composite polymer electrolyte for lithium batteries, which solves the problems of difficult degradation of polymers in polymer electrolytes in the prior art.

Method used

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  • Biodegradable composite polymer electrolyte for lithium battery and preparation method thereof
  • Biodegradable composite polymer electrolyte for lithium battery and preparation method thereof
  • Biodegradable composite polymer electrolyte for lithium battery and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0036] The biodegradable composite polymer electrolyte used in the lithium battery of this embodiment is made of the following parts by weight of raw materials: 0.35g copolymer of butylene adipate and butylene terephthalate, 0.15g polypropylene Nitrile, 0.2g lithium bistrifluoromethanesulfonimide, 0.3g aluminum oxide particles.

[0037] The method for preparing the above-mentioned biodegradable composite polymer electrolyte for lithium batteries includes the following steps:

[0038] 1) Under the protection of argon, weigh 0.35g of the copolymer of butanediol adipate and butylene terephthalate (PBAT) into 10ml of azadrine, heating and stirring at 70°C After 2h, add 0.15g polyacrylonitrile after fully dissolving, continue to stir for 2h, fully dissolve, obtain solution A;

[0039] 2) Under the protection of argon, weigh 0.2g of lithium bistrifluoromethanesulfonimide into solution A, stir at 70°C for 2h to obtain solution B;

[0040] 3) Under the protection of argon, weigh 0.3 g of alu...

Embodiment 2

[0044] The biodegradable composite polymer electrolyte used in the lithium battery of this embodiment is made of the following parts by weight of raw materials: 0.6g of copolymer of butylene adipate and butylene terephthalate, 0.2g of polyethylene Methyl acrylate, 0.03g lithium bistrifluoromethanesulfonimide, 0.17g aluminum oxide particles.

[0045] The method for preparing the above-mentioned biodegradable composite polymer electrolyte for lithium batteries includes the following steps:

[0046] 1) Under the protection of argon, weigh 0.6g of the copolymer of butylene adipate and butylene terephthalate (PBAT) into 10ml of azadrine, heating and stirring at 40°C After 3h, after fully dissolving, add 0.2g of polymethyl methacrylate, continue to stir for 3h, fully dissolve, and obtain solution A;

[0047] 2) Under the protection of argon, weigh 0.03g of lithium bistrifluoromethanesulfonimide into solution A, stir at 40°C for 0.5h to obtain solution B;

[0048] 3) Under the protection of...

Embodiment 3

[0052] The biodegradable composite polymer electrolyte used in the lithium battery of this embodiment is made of the following parts by weight of raw materials: 0.35 g of a copolymer of butylene adipate and butylene terephthalate (PBAT), 0.5 g polyvinylidene fluoride, 0.14g lithium bistrifluoromethanesulfonimide, 0.01g aluminum oxide particles.

[0053] The method for preparing the above-mentioned biodegradable composite polymer electrolyte for lithium batteries includes the following steps:

[0054] 1) Under the protection of argon, weigh 0.35g of the copolymer of butanediol adipate and butylene terephthalate (PBAT) into 10ml of azadrine, heating and stirring at 70°C 2.5h, after fully dissolving, add 0.5g polyvinylidene fluoride, continue to stir for 2h, fully dissolve, and obtain solution A;

[0055] 2) Under the protection of argon, weigh 0.14g of lithium bistrifluoromethanesulfonimide into solution A, stir at 70°C for 2h to obtain solution B;

[0056] 3) Under the protection of a...

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Abstract

The invention relates to a biodegradable composite polymer electrolyte for lithium batteries and a preparation method thereof, belonging to the field of lithium ion battery electrolytes. The biodegradable composite polymer electrolyte for lithium battery is mainly made of the following raw materials in parts by weight: 35-60 parts of biodegradable polymer, 15-50 parts of matrix polymer, 3-30 parts of conductive lithium salt, inorganic 1 to 30 parts of oxide, and its preparation method includes the following steps: 1) under the protection of an inert gas, dissolve the biodegradable polymer and matrix polymer of the formula in an organic solvent to obtain solution A; 2) prepare the formula A certain amount of conductive lithium salt is dissolved in the solution A obtained in step 1), and then the formulated amount of inorganic oxide is added, mixed evenly, and the product is obtained. The biodegradable composite polymer electrolyte for lithium batteries has the advantages of safety, less environmental pollution, high electrical conductivity and biodegradability, and is widely used in the field of lithium batteries.

Description

Technical field [0001] The invention relates to a biodegradable composite polymer electrolyte for lithium batteries and a preparation method thereof, and belongs to the field of lithium ion battery electrolytes. Background technique [0002] In today's society, people cannot do without batteries. Our country consumes about 8 billion batteries each year, and each person consumes an average of 6 to 7 batteries per year, from the remote control of the TV air conditioner to the flashlight, electric shaver, and electric toothbrush. All need battery drive, from disposable batteries to rechargeable batteries that can be recycled. However, after using the rechargeable battery for a period of time, the charging and discharging performance will decrease until it cannot be used normally. Discarded batteries have brought great pollution to our environment. From the early lead-acid batteries to the later nickel-cadmium and nickel-hydrogen batteries, the electrolyte of these batteries contain...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/0567H01M10/0525
CPCH01M10/0525H01M10/0567Y02E60/10
Inventor 杨书廷李承斌岳红云董红玉李向南尹艳红
Owner HENAN NORMAL UNIV
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