ELECTRODE AND BATTERY

摘要

An electrode and battery enabling to improve cycle characteristics owing to formation of an effective coating are disclosed. A positive electrode (21) and a negative electrode (22) are wound while having a separator (23) interposed therebetween. The separator (23) is impregnated with an electrolyte. The surface of the positive electrode (21) or the negative electrode (22) is provided with a coating which contains a compound having a surface tension smaller than that of the electrolyte and insoluble to the electrolyte, specifically a siloxane such as poly(dimethylsiloxane), poly(methylhydrosiloxane) or poly(methylphenylsiloxane), a perfluoropolyether such as poly(hexafluoropropylene oxide), or a perfluoroalkane such as perfluoropentadecane. Consequently, a coating effective for suppressing decomposition reaction of the electrolyte can be formed without using a large amount of the compound which forms the coating.