| 摘要 |
PROBLEM TO BE SOLVED: To reduce the internal resistance and realize high capacity of a battery by forming a positive electrode or a negative electrode from at least an active material and conductive fine metal powder and containing therein fine metal powder that forms a conductive network and has an mean particle diameter in a specific range. SOLUTION: A positive electrode 1 is composed by laminating an upper layer positive electrode film 2-1 and a lower layer positive electrode film 2-2 which contain fine metal powder and have a rectangular shape of a predetermined width interposing a positive electrode collector 4 made of metal foil. A negative electrode 5 is composed by laminating an upper layer negative electrode film 6-1 and a lower layer negative electrode film 6-2, which contain fine metal powder and have a rectangular shape of a predetermined width interposing a positive electrode collector 8 made of a metal foil. In addition, a cell body 10 is structured by laminating the positive electrode 1 and the negative electrode 5 interposing a separator 9. The conductivity of the positive electrode films 2-1, 2-2 and the negative electrode films 6-1, 6-2 can be improved and the resistance between the positive and negative collectors 4, 8 and these can be reduced by forming the positive electrode 1 or the negative electrode 5 from at least an active material and conductive fine metal powder and including therein fine metal powder that forms a conductive network and has a mean particle diameter in the range of 0.1-30 μm. |
