The electrochemical behavior of the nickel hydroxide electrode in binary aqueous alkali hydroxide solutions was investigated in the temperature range −40°–60°C. Maxima were observed in the electrode capacity vs. temperature curve for each electrolyte. The nature of the interaction of the alkali metal ion has a marked effect on the charge acceptance of the electrode. At the higher temperatures, the charge acceptance is greatest with the
normalLiOH‐H2O
electrolyte. At the lower temperatures, the charge acceptance is greatest with the
normalRbOH‐H2O
and
normalCsOH‐H2O
electrolytes. The results correlate with the variation in solution properties at these temperatures.
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