A preliminary evaluation was made of the cathodic discharge of nickel sulfides in electrolyte. Theoretical energy densities of approximately 400–700 whr/lb are calculated, depending on the choice of the specific nickel sulfide. The nickel sulfides tested had solubilities in the charged and partially discharged state. High coulombic efficiencies (>50%) were achieved at 1 ma/cm 2 . A discharge of 10 ma/cm 2 could be sustained, but at a lower efficiency. The discharge plateau is between 1.8 and 1.4v.
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Jasinski et al. (1969) studied this question.