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A kind of electrolyte membrane containing zwitterionic all-solid polymer and its preparation method and application

An all-solid polymer and amphoteric ion technology, which is applied in the manufacture of electrolyte batteries, non-aqueous electrolyte batteries, electrolyte immobilization/gelation, etc., can solve the problems of low room temperature conductivity and low electrochemical window, and achieve the reduction of glass Change transition temperature, reduce crystallinity, and solve the safety problems of electrolyte leakage and decomposition

Active Publication Date: 2018-11-02
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of low room temperature conductivity and low electrochemical window of existing all-solid polymer electrolytes

Method used

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  • A kind of electrolyte membrane containing zwitterionic all-solid polymer and its preparation method and application
  • A kind of electrolyte membrane containing zwitterionic all-solid polymer and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The synthesis of embodiment example 1 polyether modified polysiloxane

[0026] Weigh a certain amount of polymethylhydrogensiloxane (PMHS), mix it with an appropriate amount of toluene and add it to a 50ml three-necked flask, move it to an oil bath for heating, and add an appropriate amount of allyl-terminated polyether (PEO) (m (PEO) :m (PMHS) =2), an appropriate amount of Speier catalyst is uniformly dispersed in toluene solvent and then added in the normal pressure funnel, under N 2 Under the atmosphere, the mixed solution in the normal pressure funnel was dropped into the three-necked flask drop by drop, first reacted at 50°C for a certain period of time, then heated to 80°C for a certain period of time, until the PEO reaction was complete, the product was washed with n-hexane to remove impurities, and spin The solvent was distilled off to obtain a polyether-modified polysiloxane (PEO-g-PMHS).

Embodiment 2

[0027] The preparation of implementation example 2 polymer lithium ion batteries

[0028] (1) Place the polyether-modified polysiloxane prepared in Example 1 in a 100ml round-bottomed flask, then add an appropriate amount of crosslinking agent and lithium bistrifluoromethylsulfonimide (LiTFSI), add lithium salt The amount satisfies [EO]:[Li + ]=20:1, fully stirred in acetonitrile solvent, and mixed evenly.

[0029] (2) Pour the mixed solution in (1) into a polytetrafluoroethylene mold, then place it in a vacuum oven, and dry it in vacuum to obtain an all-solid modified polymer electrolyte membrane.

[0030] (3) The positive electrode, the all-solid polymer electrolyte membrane and the negative electrode are stacked together, sealed in a button battery or aluminum-plastic composite packaging film, and compressed into an all-solid polymer lithium-ion battery.

Embodiment 3

[0031] The preparation of implementation example 3 polymer lithium ion batteries

[0032] (1) Weigh a certain amount of polymethylhydrogensiloxane (PMHS), mix it with an appropriate amount of toluene, add it to a 50ml three-necked flask, move it to an oil bath for heating, and mix allyl-terminated polyether (PEO) ( m (PEO) :m (PMHS) =2), N,N-dimethylallylamine (DMAA) (n (DMAA) :n (PEO) =1:20) and an appropriate amount of Speier catalyst are mixed uniformly in toluene and then added to the normal pressure funnel, followed by N 2 Under the atmosphere, the mixed solution in the normal pressure funnel was dropped into the three-necked flask drop by drop, first reacted at 50°C for a certain period of time, and then heated to 80°C for a certain period of time, the mixed solution changed from colorless and transparent to a light yellow transparent solution, and the product passed through Washing with n-hexane to remove impurities, rotary evaporation to obtain grafted DMAA and PEO...

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Abstract

The invention discloses an electrolyte membrane containing a zwitterionic all-solid polymer, a preparation method and application thereof. The all-solid polymer electrolyte of the present invention consists of poly(methylhydrogensilane), N,N-dimethylallylamine, allyl-terminated polyether, 1,3-propyl sultone, lithium salt and cross-linking agent. Fully mix PMHS, PEO, DMAA in toluene, add chloroplatinic acid catalyst to react; the prepared product is then reacted with 1,3-PS; the product of the above reaction is mixed with lithium salt and cross-linking agent in acetonitrile solvent, and fully stirred The film is cross-linked in a vacuum oven to obtain an all-solid-state polymer electrolyte membrane containing zwitterions. The conductivity of the all-solid polymer electrolyte containing zwitterions of the present invention is greatly improved, reaching 3.39×10-4S·cm-1 at room temperature, and the electrochemical window exceeds 5V, which can be used in lithium secondary batteries.

Description

technical field [0001] The invention relates to an electrolyte membrane containing a zwitterionic all-solid polymer, a preparation method and application thereof. Background technique [0002] With the development of society and economy, people's demand for energy is increasing day by day. At the same time, problems such as global warming and serious air pollution are particularly prominent, which seriously affect the development and survival of human society. Therefore, lithium-ion secondary batteries, which are highly efficient Green mobile energy storage devices stand out and become the main direction of new energy development in the future. At present, lithium-ion batteries are not only widely used in smart phones, notebook computers, audio equipment, game consoles, digital cameras, handheld computers and other mobile electronic devices, but also more and more It is widely used in electric vehicles, unmanned aerial vehicles, earth orbit vehicles, civil aviation airliners...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/058H01M10/0565H01M10/0525
CPCH01M10/0525H01M10/0565H01M10/058H01M2300/0085Y02E60/10Y02P70/50
Inventor 张庆华刘明珠任超时詹晓力陈丰秋
Owner ZHEJIANG UNIV
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