| 摘要 |
PURPOSE:To secure such a secondary cell that is high in strength, and even if charging and discharging are repeated, not easily disintegrated and, what is more, excellent in a cell characteristic, by using a negative electrode, made up of alloying lithium electrochemically, on top of aluminum or an aluminum alloy reinforced with fibrous material. CONSTITUTION:This secondary cell is one that uses a negative electrode, made up of alloying lithium electrochemically, on top of aluminum or an aluminum alloy reinforced with fibrous material. It is desirable that the fibrous material is low in reactivity with an electrolyte and excellent in electrical conductivity. As for a method of compoundization with the fibrous material, for example, there are following ways that a method of mixing alloyed powder and a fiber and molding by heating, a method of processing the fiber into sheet form and dipping it in a melted alloy layer, having the alloy impregnated in the sheet inside, and a method of stacking alloyed foil and the fiber alternately and molding it by heating, etc. And, in case of a carbon fiber, it is desirable that such one covering a metal on the carbon fiber as compared with a complex with the carbon fiber itself. In the compounded electrode substrate, the fiber and the metal become entangled with each other so that disintegration of the substrate due to separation and discharge of the lithium is restrained, thus it comes to such one as excellent as a negative electrode. |
