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Electrochemical Spectroscopy of Proton Intercalation in γ-Mno2‡

Published online by Cambridge University Press:  28 February 2011

Yves Chabre  and
Michel Ripert
Yves Chabre
Affiliation:
Laboratoire de Spectrométrie Physique, Université Joseph Fourier-Grenoble BP 87, F-38402 Saint Martin d'Hères, France
Michel Ripert
Affiliation:
Institut Laue-Langevin, BP 156X, F-38042, Grenoble, France
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Abstract

We have performed electrochemical studies of proton intercalation in several varieties of γ/ε-MnO2 using an original method which combines linear sweep voltammetry and potentiostatic intermittent titration technique. This technique gave for the first time a direct evidence of a two step intercalation process in the ramsdellite units of these compounds. Either 0.5 or 1 proton per manganese are accommodated in the 1×2 channels, as previously suggested by Maskell. The reversibility of these steps has been studied and is discussed in relation to the structural modifications induced by the proton intercalation.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 210: Symposium L – Solid State Ionics II , 1990 , 367
Copyright
Copyright © Materials Research Society 1991

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Footnotes

‡

Work supported by the PIRSEM/CNRS (ARC IPROM)

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