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Issue 19, 2008
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VOx-coated LiMn2O4 nanorod clusters for lithium battery cathode materials

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Abstract

VOx-coated LiMn2O4 spinel nanorod clusters as a lithium battery cathode material are prepared by mixing OV(CH3H7)3 dissolved in ethanol and LiMn2O4 powder consisting of nanorod clusters and firing this mixture at 700 °C. In the coated spinel, the V atoms are distributed within ∼30 nm of the particle surface without showing any coating layer, indicating the possible formation of a solid solution (LiMn2−xVxO4). The coated nanorod clusters exhibit a comparable rate capability to an uncoated counterpart, showing a discharge capacity of 117 mAh g−1 at a rate of 7 C (= 1400 mA g−1), which corresponds to 89% of the capacity retention ratio at room temperature. Further, the coated cathode exhibits excellent structural stability in storage at 80 °C for 24h; a significantly decreased amount of Mn dissolution (60 ppm) is observed, in contrast to that of an uncoated counterpart (5000 ppm).

Graphical abstract: VOx-coated LiMn2O4 nanorod clusters for lithium battery cathode materials

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Publication details

The article was received on 12 Dec 2007, accepted on 04 Mar 2008 and first published on 20 Mar 2008


Article type: Paper
DOI: 10.1039/B719177D
Citation: J. Mater. Chem., 2008,18, 2257-2261
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    VOx-coated LiMn2O4 nanorod clusters for lithium battery cathode materials

    J. Cho, J. Mater. Chem., 2008, 18, 2257
    DOI: 10.1039/B719177D

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