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学科主题: Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
题名: Studies of V doping for the LiFePO4-based Li Ion batteries
作者: Hua Ning; Wang Chenyun; Kang Xueya; Wumair Tuerdi; Han Ying
通讯作者: Kang, XY
关键词: Carbothermal reduction ; Cathodes ; Crystal structure ; Cyclic voltammetry ; Diffusion ; Electrochemical properties ; Ions ; Lithium alloys ; Lithium compounds ; Olivine ; Scanning electron microscopy ; Silicate minerals ; Transmission electron microscopy ; Vanadium alloys ; X ray diffraction
刊名: Journal of Alloys and Compounds
发表日期: 2010
DOI: 10.1016/j.jallcom.2010.04.233
卷: 503, 期:1, 页:204-208
收录类别: SCI
摘要: Alien atom doping has been adopted to modify the electrochemical performance of olivine type LiFePO4 for cathode material. Here, we report that vanadium-doping can improve the performance of LiFePO4/C immensely. LiFePO4/C and V-doped LiFePO4/C cathode materials were first synthesized by carbothermal reduction method. Physico-chemical characterizations were done by X-ray diffraction, scanning electron microscopy and transmission electron microscopy. Electrochemical behavior of the cathode materials was analyzed using cyclic voltammetry (CV) and galvanostatic measurements. ICP and XRD analyses indicated that V ions were sufficiently doped in LiFePO4 and did not alter its crystal structure and exhibited the variation of lattice parameters with the doped degree. From the CV, the V ion doping affected the Li+ ionic diffusion coefficient during both the delithiation and lithiation processes and it became larger with an appropriate amount doping. From the results, it is noted that vanadium ions doping can improve performance of LiFePO4, especially on the aspect of stable cycle-life at higher C rate.
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内容类型: 期刊论文
URI标识: http://ir.xjipc.cas.cn/handle/365002/1827
Appears in Collections:材料物理与化学研究室_期刊论文

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作者单位: Xinjiang Key Lab Elect Informat Mat & Devices, Urumqi 830011, Xinjiang, Peoples R China;Chinese Acad Sci, Xinjiang Tech Inst Phys & Chem, Urumqi 830011, Xinjiang, Peoples R China;Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China

Recommended Citation:
Hua Ning,Wang Chenyun,Kang Xueya,et al. Studies of V doping for the LiFePO4-based Li Ion batteries[J]. Journal of Alloys and Compounds,2010,503(1):204-208.
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文件名: studies of v doping for the lifepo4-based li ion batteries.pdf
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