| 摘要 |
PURPOSE:To increase the charge-discharge cycle life and to decrease the self- discharge of an electrode by applying the kneaded material of the powder obtained by cooling a molten hydrogen storage alloy by a liquid quenching method and by crushing the alloy and a binder to an electrode supporter or filling the kneaded material in the electrode supporter, and immersing in high temperature concentrated alkaline solution, then forming an electrode. CONSTITUTION:Molten hydrogen storage alloy is cooled by liquid quenching method, then the alloy is crushed. The hydrogen storage alloy powder obtained is kneaded with a binder and the kneaded material is applied to or filled in an electrode supporter, then immersed in high temperature concentrated alkaline solution, washed, and dried to obtain an electrode. The electrode is pressed so as to have a desired thickness. By this process, the uniform part of CaCu5 type crystal which is effective in absorption and desorption of hydrogen in the hydrogen storage alloy is increased and the performance of a battery is improved. The electrode in which charge-discharge cycle life is long and self- discharge rate is low can be obtained. |
