Diaphragm for lithium metal battery and preparation method thereof

A technology for lithium metal batteries and separators, which is applied to lithium batteries, secondary batteries, battery pack components, etc., can solve the problems of battery gas production and capacity reduction, lithium battery short circuit, electrolyte side reactions, etc., and improve battery safety. Sexuality, reduce energy decay, reduce side effects
CN113097648AActive Publication Date: 2021-07-09JIANGSU ADVANCED MATERIAL TECH CO LTD
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
JIANGSU ADVANCED MATERIAL TECH CO LTD
Publication Date
2021-07-09

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Abstract

The invention relates to the technical field of lithium batteries, in particular to a diaphragm for a lithium metal battery and a preparation method thereof. The diaphragm for the lithium metal battery comprises a diaphragm body, at least one surface of the diaphragm body is coated with a piezoelectric ceramic layer with piezoelectric property, the surface, coated with the piezoelectric ceramic layer, of the diaphragm body faces a negative electrode of the lithium metal battery, and the piezoelectric ceramic layer is formed by compounding a conductive agent, a binder and piezoelectric ceramic particles. According to the diaphragm for the lithium metal battery, lithium ions can be uniformly deposited in the reaction process, the surface area of uniformly-separated lithium is smaller than that of dendritic lithium, side reactions can be reduced, performance degradation of the lithium battery is slowed down, the uniformly-deposited lithium cannot pierce the diaphragm to cause short circuit, and the safety of the battery is improved.
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Description

technical field

[0001] The invention relates to the technical field of lithium batteries, in particular to a separator for lithium metal batteries and a preparation method thereof. Background technique

[0002] Lithium-ion batteries are composed of winding or stacking basic unit structures, and the basic unit structure is positive electrode / separator / negative electrode. Among them, the positive electrode and the negative electrode are the place where the electrochemical reaction occurs. The current generated by the electrochemical reaction is collected and exported through the current collector in the positive electrode and the negative electrode; the separator is responsible for separating the positive electrode and the negative electrode to avoid the short circuit of the positive and negative electrodes. .

[0003] During the charging process of a lithium battery, lithium ions are deintercalated from the positive electrode active material, conducted in the electrolyte, an...

Claims

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