Metal hydride electrode and nickel-hydrogen alkaline storage cell

摘要

A metal hydride electrode is mainly composed of a hydrogen-absorbing alloy and provided with carbon powder which is selected from acetylene black, carbon black, ketjen black, and active carbon. The metal hydride electrode is further provided with an additive including an oxide and/or a hydroxide of a metal having oxidation-reduction potential nobler than an operational potential of the hydrogen-absorbing alloy. The metal hydride electrode has excellent oxygen gas absorption ability and easy detection of - DELTA V, thereby realizing to produce a nickel-hydrogen alkaline storage cell with excellent charge/discharge cycle life.