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Surface analysis on discharged MnO₂ cathode using XPS and SIMS techniques

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Title: Surface analysis on discharged MnO₂ cathode using XPS and SIMS techniques
Related: Surface and interface analysis, Vol. 41, No. 1 (2009), p.56-60
DOI: 10.1002/sia.2978
Publisher: John Wiley & Sons
Date: 2009
FoR/RFCD Code(s): 030600 Physical Chemistry (incl. Structural)
Author/Creator: Minakshi, Manickam
Author/Creator: Thurgate, Stephen
Description: Manganese dioxide (MnO₂) appears to be an effective cathode material for a battery system. No studies on lithium insertion in aqueous media are known to the best of our knowledge. However, in one of our previous papers we reported that lithium could be intercalated into a MnO₂ host compound using an aqueous LiOH electrolyte; however simple chemistry suggests that it should not. It is found that a battery with LiOH electrolyte functions quite differently from the cell that uses Li₂SO₄. This paper describes the surface modifications that accompany the electrochemical behavior of MnO₂ during redox (discharge) processes in the lithium hydroxide and sulfate media. XPS and SIMS techniques were used to study the resultant surface of the MnO₂ cathode and the spectra reveal that the formation of an insoluble layer of Li₂CO₃ precedes the process of reduction. SEM was used to study the microstructure of the MnO₂ cathode.
Description: 5 page(s)
Subject Keyword: 030600 Physical Chemistry (incl. Structural)
Subject Keyword: aqueous battery
Subject Keyword: Li₂CO₃
Subject Keyword: XPS
Subject Keyword: SIMS
Subject Keyword: MnO₂
Resource Type: journal article
Organisation: Macquarie University. Faculty of Science
Organisation: Macquarie University. Dept. of Physics and Engineering

Identifier: http://hdl.handle.net/1959.14/128238
Identifier: ISSN:0142-2421
Identifier: mq-rm-2009005654
Language: eng
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