Hydrogen-absorbing alloy electrode for alkaline storage batteries and process for producing the same

摘要

The hydrogen absorbing alloy electrode for alkaline storage batteries according to the invention is characterized in that a hydrogen absorbing alloy powder prepared by grinding a strip of hydrogen absorbing alloy produced by solidifying a molten alloy by the roll method and having a specified mean thickness to a specified mean particle size is used as a hydrogen absorbing material. In the process of producing this hydrogen absorbing alloy electrode in accordance with the invention, the above-mentioned strip of hydrogen absorbing alloy produced by the roll method is subjected to surface treatment prior to grinding. The hydrogen absorbing alloy electrode of this invention features an improved high-rate discharge characteristic at low temperature. Moreover, since the activity of the roll and free sides of the strip of hydrogen absorbing alloy can be enhanced without sacrificing the hydrogen absorbing capacity, a hydrogen absorbing alloy electrode with a large capacity and an improved high-rate discharge characteristic at low temperature can be provided.