Patent ID: 9653758
Date: 2017-05-16
CPC Classifications: H01M,Y02E

Claim:
1. A surface treatment method of a solid electrolyte for a sodium secondary battery, comprising: a first step of preparing a polymer solution obtained by polymerizing a first hydrocarbon-based binder having a hydroxyl group in a molecular structure and a second, hydrocarbon-based binder having an amine group in the molecular structure, wherein the polymerizing of the first hydrocarbon-based binder and the second hydrocarbon-based binder is performed by adding an acid catalyst to a mixed solution including the first hydrocarbon-based binder, the second, hydrocarbon-based binder, and a pore-forming agent; a second step of forming a polymer film by coating the polymer solution onto one region of a surface of a sodium ion conductive solid electrolyte; and a third step of forming a porous carbon coating layer by carbonizing the polymer film.