Patent ID: 6395423
Filing Date: 2002-05-28
Classification: H01M,Y02E,Y02P,Y10T

Abstract:
A secondary battery comprising:a negative electrode comprising a negative electrode active material; a separator; a positive electrode comprising a positive electrode active material; an electrolyte or an electrolytic solution; a collector electrode; and a battery case, wherein a surface of said negative electrode is covered with a first film made of a material having a structure through which ions in a battery reaction pass, and a surface of said positive electrode is covered with a second film through which the ions in the battery reaction are able to pass, wherein said first film comprises a large ring compound, an aromatic hydrocarbon, a fluororesin, a compound having a carbonyl group, a polymer wherein a phosphorous atom and a nitrogen atom are double bonded to each other, a glassy metal oxide, a cross-linked polymer or a conductive powder dispersion.