Abstract

In this study, it was experimentally proved that during a Ni–Cd batteries long service life (more than five years), the hydrogen accumulation in large quantities takes place in a form of nickel hydrides in a sintered nickel matrix of oxide–nickel electrodes. The capacity of the sintered nickel matrix of the oxide–nickel electrode as a hydrogen absorber was quantified as 20.1 wt% and 400 kg m−3. These values exceed thrice all the earlier data obtained by traditional methods for any reversible metal hydride.

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