Patent ID: 7097941
Filing Date: 2006-08-29
Classification: H01M,Y02E,Y02P

Abstract:
1. A solid-electrolyte secondary battery comprising: (a) a positive electrode; (b) a negative electrode; (c) a solid electrolyte comprising a matrix polymer comprising a first fluorocarbon polymer having a weight-average molecular weight of greater than 550,000 and less than 1,000,000; (d) wherein the matrix polymer further comprises a second fluorocarbon polymer having a weight-average molecular weight of greater than 300,000 and less than 550,000; (e) wherein the matrix polymer comprises 30 percent or more by weight of the fluorocarbon polymer having a weight-average molecular weight of greater than 550,000 and less than 1,000,000; (f) wherein the positive electrode has a face which is directed towards the negative electrode and the solid-electrolyte layer is formed on the face of the positive electrode and impregnates into the face a solution in which the solid electrolyte is dissolved; (g) wherein the negative electrode has a face directed toward the positive electrode and the solid-electrolyte layer is formed on the face and impregnates into the face a solution in which the solid electrolyte is dissolved; and (h) wherein the first and the second fluorocarbon polymer are a polyvinylidene fluoride/hexafluoropropylene copolymer, wherein the content of hexafluoropropylene is not less than 1% and not more than 7% by weight.