| 摘要 |
PURPOSE:To suppress voltage increase in the initial stage of charging and maintain relatively high energy density by constituting an electrode with at least two layers of conductive layers and mixing a conductive material to their one layer. CONSTITUTION:Acetylene black serving as conductive material and fluorine resin serving as binder are mixed with polyacetylene powder and the mixture is press-molded to form a conductive polymer layer 2. The conductive polymer layer 2 and a conductive polymer layer 3 containing no conductive material are press-molded and the conductive polymer layer 2 side is pressed, through a positive current collector 4, against the inner bottom of a battery case 5 which also serves as a positive terminal. A negative electrode 6 comprising lithium plate is pressed, through a negative current collector 4, against the inner bottom of a cover 8 which also serves as a negative terminal. A separator 9 is placed between the positive and negative electrodes. Voltage increase in the initial stage of charging is suppressed by the polymer 2 containing conductive material and relatively high energy density is maintained by the polymer 3 containing no conductive material. |
