Abstract
Abstract The anodic oxidation and cathodic reduction behavior of a sintered body of lithiated nickel oxide were studied. The electrode with the higher Li content was more active than that with the lower Li content with regard to the electrochemical oxidation and reduction in the potential range between oxygen and hydrogen evolution. The quantity of the higher-valency nickel oxide having an apparent valence state of nickel ions from +8/3 to +4 formed by the anodic oxidation was estimated by measuring the quantity of electricity required for reducing it to −0.14V vs. SCE. This quantity is proportional to the Li content for electrodes containing more than 0.04 atom% of Li.
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