Summary:

The present invention belongs to the field of energy storage battery, and more specifically, relates to an alkali metal surface in-situ treatment method and its application in secondary battery. The invention protects the metal by in-situ treatment of the alkali metal sheet, and the metal pole piece prepared by this method can be used for the alkali metal secondary battery with high specific energy. The metal sheet obtained by the present invention is based on the reaction between the treatment solution containing a small amount of metal salt and the surface of the alkali metal anode, and a protective film is generated on its surface, and this protective film is an organic/inorganic mixture with a mosaic-like solid electrolyte structure. The advantages of this method are: simple, easy to control, practical and economical. The alkali metal sheet is used in secondary alkali metal anode battery, which can greatly improve the energy density and cycle life of alkali metal battery, improve the performance of alkali metal secondary battery, and has great application prospects.

Link: http://epub.cnipa.gov.cn/patent/CN109638255A