Patent ID: 8951678
Filing Date: 2015-02-10
Classification: B82Y,H01M,Y02E,Y02T

Abstract:
1. A solid electrolyte comprising: a sulfide-based electrolyte; and a coating film comprising a water-resistant, lithium conductive polymer on the sulfide-based electrolyte, wherein the water-resistant, lithium conductive polymer comprises at least one selected from the group consisting of polyethylene oxide, polyethylene glycol, polypropylene oxide, polymethyl methacrylate, polydimethylsiloxane, polyvinylpyrrolidone, and polyacrylonitrile, and the coating film has a thickness of about 8 to about 12 nm, wherein the water-resistant, lithium conductive polymer is present at about 1 to about 5 parts by weight based on 100 parts by weight of the sulfide-based electrolyte, and the contact angle of a surface of the solid electrolyte is about 90° to about 120°.