Gel electrolyte diaphragm, preparation method thereof and lithium ion battery

Gel electrolyte diaphragm, preparation method thereof and lithium ion battery

The invention belongs to the technical field of battery materials, and particularly relates to a gel electrolyte diaphragm, a preparation method thereof and a lithium ion battery. The gel electrolyte diaphragm comprises a high-molecular polymer material, lithium bis(trifluoromethanesulfonyl) imide a...

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Hauptverfasser: WANG MIAO, LI JIESI, CAI SHOUKE
Format: Patent
Sprache:chi ; eng
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BASIC ELECTRIC ELEMENTS
ELECTRICITY
PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY
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creator WANG MIAO
LI JIESI
CAI SHOUKE
description The invention belongs to the technical field of battery materials, and particularly relates to a gel electrolyte diaphragm, a preparation method thereof and a lithium ion battery. The gel electrolyte diaphragm comprises a high-molecular polymer material, lithium bis(trifluoromethanesulfonyl) imide and guanidine salt ionic liquid. The guanidine salt ionic liquid in the gel electrolyte diaphragm has the advantages of stability, no volatilization, long service life, high conductivity and the like, and nitrogen contains lone pair electrons which can be coordinated with metal ions and particularly have a strong attraction effect on Mn, so that Mn generated by disproportionation reaction of a lithium manganate material is extracted; and Mn is prevented from attaching to the negative electrode to cause capacity attenuation. The gel electrolyte diaphragm is a porous polymer diaphragm, is suitable for being used in a lithium manganate battery, and can effectively prevent Mn from migrating to a negative
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subjects BASIC ELECTRIC ELEMENTS
ELECTRICITY
PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY
title Gel electrolyte diaphragm, preparation method thereof and lithium ion battery
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