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Degradable solid electrolyte membrane as well as preparation method and lithium battery prepared from same

A solid electrolyte membrane, lithium battery technology, applied in non-aqueous electrolyte batteries, solid electrolytes, lithium batteries and other directions, can solve the problems of human environmental threats, poor mechanical properties, difficult biodegradation, etc., to achieve superior performance, good mechanical properties, The effect of mitigating oil resources

Active Publication Date: 2019-07-12
苏州思达奇环保新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, many solid electrolytes use polymer materials, such as polyethylene oxide (PEO), polyacrylonitrile (PAN), polyvinylidene fluoride (PVDF), polypropylene oxide (PPO), polyvinylidene chloride (PVDC) etc., they have poor mechanical properties, are difficult to biodegrade, and remain in the environment, which is bound to pose a certain threat to the human environment

Method used

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  • Degradable solid electrolyte membrane as well as preparation method and lithium battery prepared from same
  • Degradable solid electrolyte membrane as well as preparation method and lithium battery prepared from same
  • Degradable solid electrolyte membrane as well as preparation method and lithium battery prepared from same

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preparation example Construction

[0019] The preparation method of the degradable solid electrolyte membrane, it comprises the following process steps:

[0020] (1) Methyl methacrylate pretreatment: Methyl methacrylate is washed with aqueous sodium hydroxide solution and water, then dried for subsequent use;

[0021] (2) Preparation of active silica sol: Dissolve ethyl orthosilicate in a mixed solvent of water and ethanol (the volume ratio of water and ethanol in the mixed solvent is 1:1), then add silane coupling agent, at 45-50 At ℃, stir while heating for 1-2h, then add dilute hydrochloric acid to adjust the pH of the reaction system to 3-4, and continue to react at 45-50℃ for 10-12h to obtain a colorless and transparent active silica sol;

[0022] (3) Prepare base material A: Methyl methacrylate and polylactic acid-glycolic acid copolymer, polycaprolactone, polylactic acid, diphenylmethane diisocyanate, phthalic acid after step (1) pretreatment Dibutyl ester is dissolved in the organic solvent, then adds ...

Embodiment 1

[0037] A degradable solid-state electrolyte membrane, which includes the following raw materials calculated in parts by weight: 10 parts of tapioca modified starch, 10 parts of polylactic acid-glycolic acid copolymer, 8 parts of polycaprolactone, 20 parts of polylactic acid, 10 parts of ethyl silicate, 10 parts of methyl methacrylate, 2 parts of silane coupling agent KH570, 5 parts of diphenylmethane diisocyanate, 5 parts of cellulose acetate propionate, 8 parts of dibutyl phthalate, 0.1 part of benzoyl peroxide, 10 parts of lithium perchlorate.

[0038]The preparation method of the degradable solid electrolyte membrane comprises the following process steps:

[0039] (1) Methyl methacrylate pretreatment: Methyl methacrylate is placed in a separatory funnel, washed 5 times with 5% aqueous sodium hydroxide solution, then washed with distilled water until neutral, and the methacrylic acid after washing The methyl ester was dried with anhydrous sodium sulfate, and the sodium sulf...

Embodiment 2

[0045] A degradable solid-state electrolyte membrane, which includes the following raw materials calculated in parts by weight: 12 parts of tapioca modified starch, 8 parts of polylactic acid-glycolic acid copolymer, 9 parts of polycaprolactone, 18 parts of polylactic acid, 12 parts of ethyl silicate, 8 parts of methyl methacrylate, 3 parts of silane coupling agent KH570, 4 parts of diphenylmethane diisocyanate, 7 parts of cellulose acetate propionate, 6 parts of dibutyl phthalate, 0.2 parts of benzoyl peroxide, 9 parts of lithium perchlorate.

[0046] The preparation method of the degradable solid electrolyte membrane comprises the following process steps:

[0047] (1) Methyl methacrylate pretreatment: Methyl methacrylate is placed in a separatory funnel, washed 5 times with 5% aqueous sodium hydroxide solution, then washed with distilled water until neutral, and the methacrylic acid after washing The methyl ester was dried with anhydrous sodium sulfate, and the sodium sulfa...

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Abstract

The invention relates to a degradable solid electrolyte membrane as well as a preparation method and a lithium battery prepared from same. The degradable solid electrolyte membrane comprises the following raw materials in parts by weight: 10-15 parts of modified starch, 5-10 parts of a polylactic acid-glycolic acid copolymer, 8-10 parts of polycaprolactone, 15-20 parts of polylactic acid, 10-15 parts of tetraethoxysilane, 5-10 parts of methyl methacrylate, 2-5 parts of a silane coupling agent, 3-5 parts of diphenylmethane diisocyanate, 5-10 parts of cellulose acetate propionate, 5-8 parts of dibutyl phthalate, 0.1-0.3 part of benzoyl peroxide and 8-10 parts of a lithium salt A. The degradable solid electrolyte membrane has excellent mechanical properties, high temperature resistance, goodtoughness and good electric conductivity, and is an electrolyte membrane with excellent properties.

Description

technical field [0001] The invention relates to a degradable solid electrolyte membrane, a preparation method thereof and a lithium battery made thereof. Background technique [0002] With the vigorous promotion and use of new energy vehicles, the development of high specific energy power batteries has become a hot spot in the research of new energy vehicle power sources. The biggest problem currently encountered by high specific energy lithium-ion batteries is poor cycle stability and potential safety hazards caused by the use of liquid flammable organic electrolytes. The solid electrolyte has the advantages of low reactivity with electrode materials, light weight, easy film formation, good viscoelasticity, etc., and the battery can be made into various shapes, so that the battery has pressure resistance, impact resistance, low production cost and Easy to process and use. Therefore, solid-state electrolyte thin films have become an important direction for the development ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L3/02C08L1/14C08K5/12C08K3/24C08J5/22H01M10/0565H01M10/052
CPCC08J5/22C08J2367/04C08J2403/02C08J2467/04C08K3/24C08K5/12H01M10/0525H01M10/0565H01M2300/0082Y02E60/10
Inventor 易金李艳妮
Owner 苏州思达奇环保新材料有限公司
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