Activated lithium-metal-oxides as catalytic electrodes for Li-O 2 cells

L. Trahey, C. S. Johnson, J. T. Vaughey, S. H. Kang, L. J. Hardwick, S. A. Freunberger, P. G. Bruce, M. M. Thackeray

    Research output: Contribution to journalArticleResearchpeer-review

    Abstract

    Lithium-metal oxides with a high formal Li 2 O content, such as Li 5 FeO 4 (5Li 2 OFe 2 O 3 ) and a Li 2 MnO 3 LiFeO 2 composite (Li 2 OMnO 2 Li 2 OFe 2 O 3 ) have been explored as electrocatalysts for primary and rechargeable Li-O 2 cells. Activation occurs predominantly by Li 2 O removal, either electrochemically or chemically by acid-treatment. Superior electrochemical behavior is obtained if activation occurs by acid-treatment; Li 2 MnO 3 LiFeO 2 catalysts provide 2516 mAh/g (carbon) corresponding to 931 mAh/g (electrocatalyst carbon) during the initial discharge. The reaction is reasonably reversible during the early cycles. The approach has implications for designing electrocatalysts that participate through electrochemical Li 2 O extraction/reformation reactions, offering exceptionally high capacities.

    Original languageEnglish
    JournalElectrochemical and solid-state letters
    Volume14
    Issue number5
    DOIs
    Publication statusPublished - 16 Mar 2011

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    lithium oxides
    electrocatalysts
    Electrocatalysts
    Lithium
    Oxides
    metal oxides
    Metals
    Electrodes
    electrodes
    Carbon
    cells
    Chemical activation
    activation
    acids
    Acids
    carbon
    catalysts
    cycles
    Catalysts
    composite materials

    ASJC Scopus subject areas

    • Chemical Engineering(all)
    • Materials Science(all)
    • Physical and Theoretical Chemistry
    • Electrochemistry
    • Electrical and Electronic Engineering

    Fields of Expertise

    • Advanced Materials Science

    Cite this

    Trahey, L., Johnson, C. S., Vaughey, J. T., Kang, S. H., Hardwick, L. J., Freunberger, S. A., ... Thackeray, M. M. (2011). Activated lithium-metal-oxides as catalytic electrodes for Li-O 2 cells. Electrochemical and solid-state letters, 14(5). https://doi.org/10.1149/1.3555366

    Activated lithium-metal-oxides as catalytic electrodes for Li-O 2 cells. / Trahey, L.; Johnson, C. S.; Vaughey, J. T.; Kang, S. H.; Hardwick, L. J.; Freunberger, S. A.; Bruce, P. G.; Thackeray, M. M.

    In: Electrochemical and solid-state letters, Vol. 14, No. 5, 16.03.2011.

    Research output: Contribution to journalArticleResearchpeer-review

    Trahey, L, Johnson, CS, Vaughey, JT, Kang, SH, Hardwick, LJ, Freunberger, SA, Bruce, PG & Thackeray, MM 2011, 'Activated lithium-metal-oxides as catalytic electrodes for Li-O 2 cells' Electrochemical and solid-state letters, vol. 14, no. 5. https://doi.org/10.1149/1.3555366
    Trahey, L. ; Johnson, C. S. ; Vaughey, J. T. ; Kang, S. H. ; Hardwick, L. J. ; Freunberger, S. A. ; Bruce, P. G. ; Thackeray, M. M. / Activated lithium-metal-oxides as catalytic electrodes for Li-O 2 cells. In: Electrochemical and solid-state letters. 2011 ; Vol. 14, No. 5.
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    AU - Hardwick, L. J.

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