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A high-temperature-resistant lithium ion battery separator

A lithium-ion battery and high-temperature-resistant technology, which is applied to battery components, circuits, electrical components, etc., can solve the problems of high-temperature resistance and poor stability, and achieve good wettability, increased specific surface area, and mechanical strength. high effect

Inactive Publication Date: 2018-12-18
FOSHAN TENGLI NEW ENERGY TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a high-temperature-resistant lithium-ion battery separator for the problem of poor high temperature resistance and stability of the currently commonly used lithium-ion battery separator

Method used

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preparation example Construction

[0028] The preparation method of nano-spore fiber suspension, comprises the steps:

[0029] (1) According to the mass ratio of 1:10~15, take the crude spores and sterile water, mix them in a container at 3~6°C, and centrifuge them at 3000~4000r / min for 8~15min to obtain a centrifuged mixture. Take the centrifuged mixture at a mass ratio of 1:8 ~12 Mix the added salt solution and centrifuge at 3000~4000r / min to obtain Precipitate A. Take Precipitation A and add enzyme solution 3~6 times the mass of Precipitation A, suspend, heat in 27~35℃ water bath for 1~3h for enzymolysis After that, heat up to 75~90°C to inactivate the enzyme for 10~15min, filter, take the filter residue and add solvent A which is 3~6 times the weight of the filter residue, mix, centrifuge at 4~8°C, 4000~5000r / min for 8~15min, and obtain the precipitate B. Take the precipitate B and add sterile water according to the mass ratio of 1:4~8, shake and mix well, centrifuge at 4~8°C, 4000~5000r / min for 8~15min to ...

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Abstract

The invention discloses a high-temperature-resistant lithium ion battery separator, belonging to the technical field of lithium ion batteries. A bacillus spore crude product is used as raw material, after centrifugation, salt solution soaking, centrifugation, enzymatic hydrolysis and other operations to purify spores, high-pressure extrusion breaks the wall into fine powder and then acid leachingis carried out, in conjunction with other ingredient, a nano-spore fiber suspension is prepared, the spore fibrous tissue can be purified effectively, in sodium metaaluminate, take urea and that likeas raw materials, not only can the pore size of the membrane be reduced, increase in specific surface area, An active particle have an intercepting electrode, The lithium-ion battery separator with spore-like structure can be formed by combining with other components, and the positive and negative electrodes of the battery are separated by high resistance and high temperature resistance, thus forming a stable battery system. The invention solves the problems of poor high-temperature resistance and stability of the lithium ion battery separator commonly used at present.

Description

technical field [0001] The invention belongs to the technical field of lithium-ion batteries, and in particular relates to a high-temperature-resistant lithium-ion battery diaphragm. Background technique [0002] The main function of the separator of the battery is to prevent the active material of the positive electrode and the negative electrode from direct contact, and to prevent the internal short circuit of the battery. The requirements for the diaphragm are good chemical properties and certain mechanical strength. The diaphragm has little resistance to the movement of electrolyte ions and should be a good electronic insulator. At present, the diaphragm of lithium-ion batteries generally adopts tissue paper or polypropylene fiber membrane. Due to the good compactness of tissue paper and polypropylene fiber membrane, the pores are not large and the liquid absorption is not strong enough. If there is a diaphragm that is guaranteed to have the same thickness as the tissue...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/16H01M2/14H01M50/403H01M50/446
CPCH01M50/411H01M50/44H01M50/403Y02E60/10
Inventor 刘菊花陈建春庞成荣
Owner FOSHAN TENGLI NEW ENERGY TECH CO LTD
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