Batteries: The Role of AlF3 Coatings in Improving Electrochemical Cycling of Li-Enriched Nickel-Manganese Oxide Electrodes for Li-Ion Batteries (Adv. Mater. 9/2012)

Authors

  • Yang-Kook Sun,

    Corresponding author
    1. Department of WCU Energy Engineering, Chemical Engineering, Hanyang University, Seoul 133-791, Republic of Korea, Fax: (+82) 2-2283-7329
    • Department of WCU Energy Engineering, Chemical Engineering, Hanyang University, Seoul 133-791, Republic of Korea, Fax: (+82) 2-2283-7329
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  • Min-Joon Lee,

    1. Department of WCU Energy Engineering, Chemical Engineering, Hanyang University, Seoul 133-791, Republic of Korea, Fax: (+82) 2-2283-7329
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  • Chong S. Yoon,

    Corresponding author
    1. Department of Materials Science and Engineering, Hanyang University, Seoul 133-791, Republic of Korea, Fax: (+82) 2-2220-1838
    • Department of Materials Science and Engineering, Hanyang University, Seoul 133-791, Republic of Korea, Fax: (+82) 2-2220-1838
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  • Jusef Hassoun,

    1. Department of Chemistry, University of Rome “La Sapienza”, Piazza Aldo Moro 5, 00185, Italy, Fax: (+39) 06-491769
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  • Khalil Amine,

    1. Electrochemical Technology Program, Chemical Sciences and Engineering Division, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439, USA
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  • Bruno Scrosati

    Corresponding author
    1. Department of Chemistry, University of Rome “La Sapienza”, Piazza Aldo Moro 5, 00185, Italy, Fax: (+39) 06-491769
    • Department of Chemistry, University of Rome “La Sapienza”, Piazza Aldo Moro 5, 00185, Italy, Fax: (+39) 06-491769.
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Abstract

original image

Y.-K. Sun, C. S. Yoon, B. Scrosati and co-workers report on page 1192 the role of an AlF3-coating layer on Li-enriched cathode materials, which not only improves electrochemical performances but also thermal stability. These improvements are attributed to the trans-formation of the initial layer (Li2MnO3) to a spinel phase, induced by the Li chemical-leaching effect of the AlF3 coating layer. The spinel phase transferred from the layer on the Li-enriched electrodes is able to negate the previous shortcomings of these designs.

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