A kind of medium electrolyte, lithium ion battery and preparation method thereof

A lithium-ion battery and electrolyte technology, which is applied in the direction of solid electrolyte, non-aqueous electrolyte, electrolyte immobilization/gelation, etc., can solve the problems of insignificant improvement in charge and discharge efficiency, growth of lithium dendrites, and easy combustion of electrolyte, etc. Achieve the effects of unaffected cycle and rate performance, high room temperature conductivity and temperature resistance, and good chemical stability
CN111682258BActive Publication Date: 2021-09-03南通赛得能源有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
南通赛得能源有限公司
Publication Date
2021-09-03

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Abstract

The invention discloses a medium electrolyte, which includes the following substances according to the mass fraction: 6% to 24% conductive lithium salt; 70% to 90% polymer electrolyte matrix; 3% to 6% plasticizer; the invention also discloses the use of the The lithium-ion battery of medium electrolyte, comprises the positive pole piece that the surface is coated with quasi-solid electrolyte and lithium negative pole piece, and lithium negative pole piece surface is coated with described medium electrolyte; Preferably described quasi-solid state electrolyte comprises methyl methacrylate, Li 1.5 Al 0.5 Ge 1.5 (PO 4 ) 3 and mesoporous molecular sieve; the present invention also discloses the preparation method of the medium electrolyte; the present invention utilizes the state of the medium electrolyte semi-solid gel to have good chemical stability to lithium metal, suppresses the growth of lithium dendrites, and thus obtains lithium metal with excellent performance ion battery.
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Description

technical field

[0001] The invention relates to the technical field of lithium ion batteries, in particular to a medium electrolyte, a lithium ion battery using the medium electrolyte and a preparation method of the medium electrolyte. Background technique

[0002] With the popularization of electric vehicles, the safety issues of high energy density lithium batteries are becoming increasingly severe. Especially in recent years, the electric vehicle fire incidents reported internationally and domestically have become more and more frequent, which highlights the challenge of designing batteries with both safety and energy density.

[0003] In order to further improve the energy density and safety performance of lithium-ion batteries, solid-state batteries have become the only way. The conductivity of all-solid-state batteries cannot meet the requirements, and more exploration is needed to achieve mass production. Industrialized lithium-ion batteries, including global power b...

Claims

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