work involved the use of battery-type (i.e., T-) MnO~. The observed value is lower than that recorded under cyclic voltammetry conditions. A similar effect was again noted in the iridium oxide case (14). The difference is attributed primarily to chemical effects, i.e., the redox processes are rapid, but either the more anionic oxidation product is somewhat unstable (dissociating or rearranging slowly to give a more neutral phase) or the more inert, neutral (i.e., bulk) oxide plays a greater role in the equilibrium value recorded under open-circuit conditions. The potentiaYpH response observed under cyclic voltammetry conditions may be most relevant to the behavior of MnO2 under current supply situations in battery systems, i.e., the interaction between oxide acidity and redox behavior seems to be particularly relevant with regard to an interpretation of the charge/discharge characteristics (dynamic as opposed to open-circuit) behavior of MnO2.) unless CC License in place (see abstract). ecsdl.org/site/terms_use address. Redistribution subject to ECS terms of use (see 130.237.29.138 Downloaded on 2015-03-08 to IP
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