| 摘要 |
PURPOSE:To make charge-discharge smooth and to increase charge-discharge capacity by using a conductive polymer electrolytically polymerized by applying asymmetrical voltage in which voltage alternately varies between positive and negative sides with time and a period retaining positive voltage is longer than the negative voltage period a positive electrode and/or a negative electrode. CONSTITUTION:A positive electrode 1 and a negative electrode 2 are arranged on both sides of a separator 3, and a negative current collector 7 is formed in the outside center of the negative electrode 2. These electrodes are accommodated in a positive can 4 and a negative can 5, and these cans are packed with an insulating gasket 6 to form a secondary battery. To form the electrode, an electrolyte is formed by dissolving 0.2M pyrrole (C4H5N) and 0.2M lithium perchlorate (LiClO4) in propylene carbonate. An anode comprising stainless steel net and a cathode comprising lithium foil are immersed in the electrolyte and asymmetric voltage obtained by superimposing a.c. voltage having a maximum peak value of 4.0V and a frequency of 150Hz on d.c. voltage of 2.0V is applied to the electrodes to electrolyze and polypyrrole is formed in the anode by electrolytic polymeriation. |
