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Issue 23, 2014
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Alluaudite LiMnPO4: a new Mn-based positive electrode for Li rechargeable batteries

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Abstract

A novel, Na-pillared LiMnPO4 (Li0.78Na0.22MnPO4) with an alluaudite structure is successfully prepared for the first time and proposed as a new positive electrode for Li rechargeable batteries. Approximately 0.8 Li+ ions are reversibly extracted from and reinserted into LiMnPO4via Mn2+/Mn3+ redox reactions. The alluaudite LiMnPO4 (a-LiMnPO4) structure is sufficiently robust during repeated Li extraction/insertion such that ∼92% of the initial capacity is retained after 50 charge/discharge cycles. An ex situ XRD study of the electrochemical cell during cycling indicates that Li de/intercalation in alluaudite LiMnPO4 occurs via the one-phase (solid–solution) reaction instead of the two-phase reaction observed in olivine LiMnPO4.

Graphical abstract: Alluaudite LiMnPO4: a new Mn-based positive electrode for Li rechargeable batteries

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Publication details

The article was received on 24 Feb 2014, accepted on 25 Mar 2014 and first published on 27 Mar 2014


Article type: Communication
DOI: 10.1039/C4TA00955J
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Citation: J. Mater. Chem. A, 2014,2, 8632-8636

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    Alluaudite LiMnPO4: a new Mn-based positive electrode for Li rechargeable batteries

    J. Kim, H. Kim, K. Park, Y. Park, S. Lee, H. Kwon, H. Yoo and K. Kang, J. Mater. Chem. A, 2014, 2, 8632
    DOI: 10.1039/C4TA00955J

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