| 摘要 |
PROBLEM TO BE SOLVED: To improve the productivity and the shelf life by forming a positive electrode of two or more layers, of which the content of the positive electrode material in the mix is different from each other, and including insulating solid grains in the mix of a layer far thest from a collector. SOLUTION: A positive electrode of this battery is formed by coating a collector with two or more layers including the positive electrode material, which can reversibly absorb and discharge lithium. These coating layer is respectively formed of the positive electrode material, binder and the conductive material. Especially, a layer farthest from the collector includes the insulating solid grains, but content of the positive electrode material in the mix of this layer is desirably set at 10% by weight or more and 60% by weight or less, and content thereof of other layer is set at 70% or more and 98% or less at an average. As the insulating solid grains, oxide is used, and titanium dioxide is most desirable. |
