| 摘要 |
PURPOSE:To ensure an increase in the strength of a nickel electrode without causing a drop in the utilization factor of an active material by causing paste containing the active material or the like to contain the fine grains of fluororesin, including polytetrafluoroethylene, and water soluble polymer. CONSTITUTION:In manufacturing a nickel electrode by using a paste system, paste containing an active material (i.e., active material paste) is made to contain water soluble polymer, together with fine grains of fluororesin including polytetrafluoroethylene. As a result, even when the paste is strongly kneaded mechanically, the excessive fibrilation of the fluororesin including the polytetrafluoroethylene is restrained, and the occurrence of gumming can be prevented. Thus, the active material paste is kept in paste state and, therefore, an electrode base substance can be easily charged with the material. In addition, the adhesion of the fluororesin is embodied by the application of pressure after charging, so that the active materials are strongly bonded to each other, or the active material and the electrode base substance are strongly bonded to each other. Electrode strength can thereby be increased and a drop in the utilization factor of the active material can be restrained. |
