Patent ID: 7727674
Filing Date: 2010-06-01
Classification: H01M,Y02E,Y02P

Abstract:
1. A nonaqueous secondary battery comprising: an active material compound layer placed on at least one face of a collector made of metal foil; an electrode of one polarity that has a portion with a part where the metal of said collector made of metal foil is exposed; and an electrode of the opposite polarity, which faces the portion with exposed metal of said electrode of one polarity through an interposed separator; a protective layer made of material which has electronic conductivity lower than that of said exposed metal of said electrode and which moreover is non-insulative being formed on that part of said portion with exposed metal that faces said electrode of the opposite polarity through said interposed separator; wherein said non-insulative protective layer consists of an insulative high-molecular substance; wherein said insulative high-molecular substance is at least one item selected from a group consisting of polyimide, polyamidoimide, and polyvinyl idene fluoride; wherein said electrode of the opposite polarity has an active material compound layer whose primary constituent is carbon.