| 摘要 |
PURPOSE:To provide a nonaqueous solvent secondary battery with strong positive electrode body and high charge/discharge cycle performance by using polyolefin resin aqueous dispersion as a binder of the positive electrode body. CONSTITUTION:A metal chalcogen compound or its oxide is used as a positive electrode active material of a nonaqueous solvent secondary battery, and aqueous dispersion of polyolefin resin having a mean particle size of 20mum or less is used as a binder. The dispersibility of the binder is enhanced and a positive electrode body with high mechanical strength can be obtained. The polyolefin resin is preferably thermoplastic elastomer comprising ethylene-propylene copolymer. In the manufacturing process of the positive electrode body, heating treatment at a temperature of the lowest film forming temperature or higher of the polyolefin resin aqueous dispersion serving as the binder is preferable. |
