| 摘要 |
PURPOSE:To reduce the contact resistance greatly so as to increase the charge/ discharge capacity and elongate the cycle life, by making at least one of the electrodes from conductive polymer and carbonizing the surface of the electrode facing the collecting surface of a cell. CONSTITUTION:A positive electrode material made from a conductive polymer such as polyacetylene which is doped with anion or the like is shaped on a disk. It is then brought into contact with a plate heated to about 600 deg.C in vacuum to carbonize its one face and lay a carbon layer on the face to form a positive electrode 1. The positive electrode 1 is, with its carbonized surface facing the positive electrode collector 6, pressure-bonded onto the inside of a positive electrode can 5 and is combined with a negative electrode 3 made from metal lithium, a separator 2 using a glass filter, etc. to form a secondary cell. Therefore, the contact performance between the collecting surface and the electrode surface is improved resulting in increased capacity and improved cycle life, and oxidation reaction on the collecting surface is suppressed to prevent spontaneous discharge. |
