Synthesis and Electrochemical Performance of Mn4+ Doped Lithium Vanadium Oxide

Chin J Mater Res

2011, Vol. 25

Issue (2): 205-208 DOI:

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Synthesis and Electrochemical Performance of Mn4+ Doped Lithium Vanadium Oxide

CHEN Yiwei¹, ZHANG Ying¹, WANG Dayun², HAN Enshan¹

1.School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130
2.School of Sciences, Hebei University of Technology, Tianjin 300130

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CHEN Yiwei ZHANG Ying WANG Dayun HAN Enshan. Synthesis and Electrochemical Performance of Mn4+ Doped Lithium Vanadium Oxide. Chin J Mater Res, 2011, 25(2): 205-208.

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Abstract According to the stoichiometric ratio of xLiV3O8·yLiMn2O4 (x:y=1:0, 4:1, 8:1, 12:1, 16:1), lithium vanadium oxide Mn4+–LiV3O8 was synthesized by a sol–gel method with LiOH·H2O, NH4VO3, Mn(CH3 COO)2·4H2O and C6 H8O7·H2O as starting materials, and its electrochemical characterization and structure has been investigated. The results show that the Mn4+–LiV3O8 made by sol–gel method has well–developed crystal structure of layered LiV3O8 and a good charge–discharge characterization. The initial discharge specific capacity with Mn4+ doping at x:y=12:1 reaches 387.9 mAh/g, which is 29.3% larger than that of pure material (299.9 mAh/g), and keeps 376.4 mAh/g after 30 cycles when cycles at 0.1C rate over the voltage range of 1.8–3.8 V. Further-more, the material preserves a high charge-discharge efficiency above 97%.

Key words: inorganic non-metallic lithium-ion battery cathode material doping cyclic voltammogram sol-gel method

Received: 16 August 2010

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