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This paper has experimentally proved that hydrogen accumulates in large quantities in metal ceramic electrodes of alkaline accumulators during their operation. It has been found that hydrogen is not present in the metal ceramic electrodes of alkaline accumulators not yet in operation. It is shown that in alkaline accumulators with a service life of more than five years, the largest amount of hydrogen is present in their electrodes. Hydrogen is found to accumulate in oxide-nickel electrodes of alkaline accumulators, which have hydrogen absorption capacity of 13.4 wt%. Sintered nickel matrix of oxide-nickel electrode of alkaline accumulator was considered. The values of hydrogen absorption in this matrix are 20.2 wt%, the stored energy density is 44.018 kJ/g. The results obtained in the operation are three times higher than the previously obtained data, which are based on the use of traditional methods for reversible metal hydrides, such as magnesium hydride and complex hydrides. In addition, the results obtained exceed the values announced in the criteria for hydrogen storage systems developed by the US Department of Energy.

Research into storage processes in batteries to create highly efficient reversible hydrogen storage