Thermal lithiation of manganese dioxide : effect of low lithium concentration (x ≤ 0.3 in Li <inf>x</inf>MnO <inf>2</inf>) on structure and electrochemical performance

Lehr, J; Dose, WM; Yakovleva, M; Donne, SW

Abstract

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Thermal Lithiation of Manganese Dioxide: Effect of Low Lithium Concentration (x ≤ 0.3 in LixMnO2) on Structure and Electrochemical Performance
Joshua Lehr1, Wesley M. Dose1, Marina Yakovleva2 and Scott W. Donne3,4,1

Published 30 April 2012 • ©2012 ECS - The Electrochemical Society
Journal of The Electrochemical Society, Volume 159, Number 6
Citation Joshua Lehr et al 2012 J. Electrochem. Soc. 159 A904
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Abstract
The effect of lithium concentration on LixMnO2 (x ≤ 0.3) materials prepared by co-precipitation/heating is investigated. Lithium concentration determines the phase formed, with three different phases identified in the concentration range. Low levels of lithiation (x = 0.08) leads to the formation of a γ/β type MnO2 material. As the lithium concentration is increased to x = 0.15, a lithiated γ−MnO2 like phase is formed. Finally, at x = 0.28 tunnel structured monoclinic MnO2 is obtained. Increasing the concentration of lithium inhibits the formation of the undesired inactive Mn2O3 phase, which is formed upon heat-treatment of MnO2. At a 5 mA/g charge/discharge rate the monoclinic Li0.28MnO2 material gave the best performance, while at 30 mA/g the Li0.08MnO2 material proved superior.

Citation

Lehr, J., Dose, W., Yakovleva, M., & Donne, S. (2012). Thermal lithiation of manganese dioxide : effect of low lithium concentration (x ≤ 0.3 in Li xMnO 2) on structure and electrochemical performance. Journal of The Electrochemical Society, 159(6), A904-A908. https://doi.org/10.1149/2.115206jes

• Journal Article Type: Article
• Publication Date: Apr 30, 2012
• Deposit Date: Aug 11, 2021
• Journal: Journal of the Electrochemical Society
• Print ISSN: 0013-4651
• Electronic ISSN: 1945-7111
• Publisher: Electrochemical Society
• Volume: 159
• Issue: 6
• Pages: A904-A908
• DOI: https://doi.org/10.1149/2.115206jes
• Publisher URL: https://doi.org/10.1149/2.115206jes
• Related Public URLs: http://jes.ecsdl.org/