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Citation: FENG Ji-Jun, LIU Xiang-Zhe, LIU Xiao-Zhen, JIANG Jian-Zhuang, ZHAO Jing. Hydrothermal Syntheses and Properties of LiV_3-xMn_xO₈ as Cathode Materials for Lithium Ion Batteries[J]. Acta Physico-Chimica Sinica, ;2009, 25(08): 1490-1494. doi: 10.3866/PKU.WHXB20090901 shu

Hydrothermal Syntheses and Properties of LiV_3-xMn_xO₈ as Cathode Materials for Lithium Ion Batteries

1.
School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, P. R. China

Received Date: 31 March 2009
Available Online: 3 July 2009

The Mn modified lithiated vanadium oxides LiV3-xMnxO8 (x=0.00, 0.01, 0.02, 0.04, 0.06, 0.08, 0.10) as promising cathode materials for secondary lithium batteries were prepared using a hydrothermal method. Crystalline phases were characterized by powder X-ray diffraction (XRD) and the morphology was observed by scanning electron microscopy (SEM). The electrochemical properties of the synthesized samples were investigated by galvanostatic charge and discharge at a current density of 50 mA·g-1. The effects of manganese doping on crystal stability were analyzed in terms of the material structure and electrochemical performance. The electrochemical properties were greatly improved after manganese doping. Among the doping modified materials, LiV2.94Mn0.06O8 showed the highest initial specific discharge capacity which was 295 mAh·g-1. od cycle performance was achieved when 0.01≤x≤0.08. All the LiV3-xMnxO8 (0.01≤x≤0.08) materials maintained the specific discharge capacities of more than 120 mAh·g-1 after 20 cycles and 100 mAh·g-1 after 40 cycles thereby preserving the high charge-discharge efficiencies of no less than 93%.
- Lithiumion battery,
- Cathode material,
- Hydrothermal synthesis,
- Lithiumtrivanadate,
- Mn doping
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沈阳化工大学材料科学与工程学院沈阳 110142

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Hydrothermal Syntheses and Properties of LiV3-xMnxO8 as Cathode Materials for Lithium Ion Batteries

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通讯作者: 陈斌, bchen63@163.com

Hydrothermal Syntheses and Properties of LiV_3-xMn_xO₈ as Cathode Materials for Lithium Ion Batteries