Ionic conductivity of a single porous MnO2 mesorod at controlled oxidation states

Timothy Plett; Trevor Gamble; Eleanor Gillette; Sang Bok Lee; Zuzanna S. Siwy

doi:10.1039/C5TA03196F

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Ionic conductivity of a single porous MnO₂ mesorod at controlled oxidation states†

Timothy Plett,^a Trevor Gamble,^a Eleanor Gillette,^b Sang Bok Lee^b and Zuzanna S. Siwy*^ac

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* Corresponding authors

^a Department of Physics, University of California, Irvine, Irvine, CA 92697-4575, USA
E-mail: zsiwy@uci.edu
Fax: +1 9498242174
Tel: +1 9498246911

^b Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742, USA
Fax: +1 3013149121
Tel: +1 3013149121

^c Department of Chemistry, University of California, Irvine, Irvine, CA 92697-2025, USA
Fax: +1 9498248571
Tel: +1 9498244097

Abstract

The ionic conductivity of porous MnO₂ at the nanoscale is not well understood, despite possible importance in battery charging/discharging processes. It is demonstrated here that MnO₂ in different oxidation states exhibits different ionic conductivities and surface charge characteristics, which are probed by reversal potential measurements.

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Article information

DOI: https://doi.org/10.1039/C5TA03196F
Article type: Paper
Submitted: 30 Apr 2015
Accepted: 18 May 2015
First published: 18 May 2015

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J. Mater. Chem. A, 2015,3, 12858-12863

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Ionic conductivity of a single porous MnO₂ mesorod at controlled oxidation states

T. Plett, T. Gamble, E. Gillette, S. B. Lee and Z. S. Siwy, J. Mater. Chem. A, 2015, 3, 12858 DOI: 10.1039/C5TA03196F

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Journal of Materials Chemistry A