| 摘要 |
PROBLEM TO BE SOLVED: To provide a high-capacity lithium secondary battery by using polytetrafluoroethylene as a binder of a positive electrode active material, thereby improving the viscosity characteristic and film strength of its paint, and preventing the degradation of the positive electrode active material. SOLUTION: In relation to the manufacturing of a lithium battery composed by facing a sheet-like positive electrode 1 to a sheet-like negative electrode 2 through a separator 3 in an organic electrolyte 4, a feature of this manufacturing method are that when the sheet-like positive electrode 1 is produced, a diffused solution prepared by diffusing fine powder of polytetrafluoroethylene into a hydrocarbon solvent and a solution prepared by dissolving a polyolefin resin into a hydrocarbon solvent are mixed together, a paint is prepared by further mixing a positive electrode active material with it, the paint is applied to a conductive base and dried, and thus, a paint film containing a mixture of the positive electrode active material, the polytetrafluoroethylene as a binder and the polyolefin resin is formed on the conductive base. |
