Lithium battery negative plate loaded with temperature-resistant composite layer and preparation method

A technology for negative pole pieces and lithium batteries, applied in the direction of negative electrodes, battery electrodes, secondary batteries, etc., can solve problems such as thermal runaway and lithium battery thermal runaway, and achieve improved temperature resistance, good safety and usability, The effect of high ionic conductivity
CN112259707AActive Publication Date: 2021-01-22山东亿维新材料有限责任公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
山东亿维新材料有限责任公司
Publication Date
2021-01-22

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Abstract

The invention provides a lithium battery negative plate loaded with a temperature-resistant composite layer and a preparation method. The lithium battery negative plate is prepared by spraying a turbid liquid B on the negative plate loaded with a porous conductive layer, and the turbid liquid B is prepared by adding an inorganic temperature-resistant material into a mixed solution; the negative plate loaded with the porous conductive layer is prepared by spraying a turbid liquid A on the negative plate, the turbid liquid A is prepared by adding an inorganic lithium ion conductor, polyoxyethylene and graphene oxide powder into a mixed solution, and the negative plate is prepared by mixing a negative active material, polyvinylidene fluoride and a conductive agent and coating a copper foil with the mixture, wherein the mixed solution is prepared by dissolving a polyvinylidene fluoride hexafluoropropylene copolymer in a mixed solvent of acetone and N, N-dimethylformamide. The lithium battery negative plate provided by the invention not only has good temperature resistance, but also has high ionic conductivity and good safety and usability, and meanwhile, the preparation process is simple and suitable for industrial production.
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Description

technical field

[0001] The invention relates to the technical field of lithium battery negative poles, in particular to a lithium battery negative pole piece loaded with a temperature-resistant composite layer and a preparation method thereof. Background technique

[0002] Lithium battery, as a new generation of energy battery, has become a typical representative of new energy due to its low cost, high performance, high power, green environment and many other advantages. It is widely used in 3C digital products, mobile power and electric vehicles and other fields. In recent years, with the intensification of environmental pollution and the guidance of national policies, the demand for lithium batteries in the electric vehicle market has continued to increase, and lithium batteries have become the key development content of new energy materials.

[0003] With the application and promotion of lithium batteries, battery safety issues have attracted extensive attention in the pr...

Claims

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