Lithium insertion into manganese dioxide electrode in MnO2/Zn aqueous battery: Part III. Electrochemical behavior of γ-MnO2 in aqueous lithium hydroxide electrolyte

M Minakshi; P Singh; T B Issa; S Thurgate; Roland De Marco

doi:10.1016/j.jpowsour.2005.03.184

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Lithium insertion into manganese dioxide electrode in MnO2/Zn aqueous battery: Part III. Electrochemical behavior of γ-MnO2 in aqueous lithium hydroxide electrolyte

Journal article

Peer reviewed

Lithium insertion into manganese dioxide electrode in MnO2/Zn aqueous battery: Part III. Electrochemical behavior of γ-MnO2 in aqueous lithium hydroxide electrolyte

M Minakshi, P Singh, T B Issa, S Thurgate and Roland De Marco

Journal of Power Sources, Vol.153(1), pp.165-169

2006

DOI: https://doi.org/10.1016/j.jpowsour.2005.03.184

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Abstract

Chemical Sciences

Engineering

cyclic voltammetry (CV)

lithium insertion

rechargeability

ionic size

The electrochemical behavior of γ-MnO2 in lithium hydroxide (LiOH) and potassium hydroxide (KOH) aqueous media has been studied using slow-scan cyclic voltammetry (25 μV s-1) in conjunction with X-ray analysis (XRD) and scanning electron microscopy (SEM). The reduction of γ-MnO2 in aqueous LiOH results in intercalation of Li+ forming a new phase of lithium intercalated MnO2 (LixMnO2). The process is found to be reversible. In this regard, the reduction of γ-MnO2 in LiOH is quite different from that in aqueous KOH, which is irreversible and no lithium intercalation occurs. This difference in behavior is explained in terms of the relative ionic sizes of Li + and K+. The LixMnO2 lattice is stable only for Li+ because Li+ and Mn4+ are of approximately the same size whereas KxMnO2 is not stable because K+ has almost double the size.

Details

Title: Lithium insertion into manganese dioxide electrode in MnO2/Zn aqueous battery: Part III. Electrochemical behavior of γ-MnO2 in aqueous lithium hydroxide electrolyte
Authors: M Minakshi (Author) - Murdoch University
P Singh (Author) - Murdoch University
T B Issa (Author) - Murdoch University
S Thurgate (Author) - Murdoch University
Roland De Marco (Author) - Curtin University of Technology
Publication details: Journal of Power Sources, Vol.153(1), pp.165-169
Publisher: Elsevier S.A.
Date published: 2006
DOI: 10.1016/j.jpowsour.2005.03.184
ISSN: 0378-7753
Organisation Unit: University of the Sunshine Coast, Queensland; Office of the Deputy Vice-Chancellor (Research and Innovation)
Language: English
Record Identifier: 99449442502621
Output Type: Journal article

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Collaboration types: Domestic collaboration
Web Of Science research areas: Chemistry, Physical; Electrochemistry; Energy & Fuels; Materials Science, Multidisciplinary