Title

Synthesis and Characterization of MnO₂-Based Mixed Oxides as Supercapacitors

Author(s)

Hansung Kim, University of South Carolina - Columbia
Branko N. Popov, University of South Carolina - ColumbiaFollow

Document Type

Article

Subject Area(s)

Chemical Engineering

Abstract

Mn/Pb and Mn/Ni mixed oxide were prepared at ambient temperature by reduction of KMnO₄ with Mn, Pb, and Ni salts. This low-temperature approach provides amorphous structure of the active material. The specific capacitance of pure MnO₂ was estimated to be 166 F/g and increased to 210 and 185 F/g for Mn/Ni and Mn/Pb oxides, respectively. The carbon loading was optimized at 20 wt %. Based on a single electrode, the Mn/Ni mixed oxide showed a high rate capability of 3.12 Wh/kg at constant power discharge of 1 kW/kg.

Publication Info

Journal of the Electrochemical Society, 2003, pages D56-D62.

© The Electrochemical Society, Inc. 2003. All rights reserved. Except as provided under U.S. copyright law, this work may not be reproduced, resold, distributed, or modified without the express permission of The Electrochemical Society (ECS). The archival version of this work was published in the Journal of the Electrochemical Society.

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Publisher's link: http://dx.doi.org/10.1149/1.1541675