McDermott Will & Emery LLP
Nonaqueous electrolyte secondary battery
A non-aqueous electrolyte secondary battery including: a positive electrode; a negative electrode; a separator interposed between the positive electrode and the negative electrode; a non-aqueous electrolyte; and a porous insulating film adhered to a surface of at least one selected from the group consisting of the positive electrode and the negative electrode, the porous insulating film including an inorganic oxide filler and a film binder, wherein the ratio R of actual volume to apparent volume of the separator is not less than 0.4 and not greater than 0.7, and wherein the ratio R and a porosity P of the porous insulating film satisfy the relational formula: −0.10≦R−P≦0.30.
Matsushita Electric Industrial Co., Ltd.
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Kohei Kaoru Shigeo Yusuke Kiyomi Tetsuya
Suzuki Inoue Ikuta Fukumoto Kato Hayashi