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学科主题: Materials Science
题名: Synthesis and Electrochemical Characterizations of Zinc-doped LiFePO4/C by Carbothermal Reduction
作者: Hua Ning; Wang Chen-Yun; Kang Xue-Ya; Tuerdi; Han Ying
通讯作者: Kang, XY
关键词: LiFePO4 ; doping zinc ; lithium ion battery ; cycle performance
刊名: JOURNAL OF INORGANIC MATERIALS
发表日期: 2010
DOI: 10.3724/SP.J.1077.2010.10105
卷: 25, 期:8, 页:887-892
收录类别: SCI
资助者: Xinjiang High-Technology Research & Development Program
摘要: Alien atom doping has been adopted to modify the electrochemical performance of olivine type LiFePO4 for cathode material. Here, we report that zinc-doping can improve the performance of LiFePO4/C immensely by a simple method. LiFePO4/C and Zn-doped LiFePO4/C cathode materials were firstly synthesized by carbothermal reduction method. Physical-chemical characterizations were done by X-ray diffraction, scanning electron microscope and transmittance electron microscope. Electrochemical behavior of the cathode materials were analyzed by using cyclic voltammetry, and galvanostatic measurements were employed to characterize the reaction of lithium ion insertion and de-insertion. ICP and XRD analyses indicate that Zn ions were sufficiently doped in LiFePO4 and did not alter its crystal structure. During de-intercalation and intercalation process of lithium ions, the doped zinc atoms protect the LiFePO4 crystal from shrink. Consequently, the conductivity is enhanced after doping. It is noted that zinc 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/365002/1856
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: Chinese Acad Sci, Xinjiang Tech Inst Phys & Chem, Urumqi 830011, Peoples R China;Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China;Xinjiang Key Lab Elect Informat Mat & Devices, Urumqi 830011, Peoples R China

Recommended Citation:
Hua Ning,Wang Chen-Yun,Kang Xue-Ya,et al. Synthesis and Electrochemical Characterizations of Zinc-doped LiFePO4/C by Carbothermal Reduction[J]. JOURNAL OF INORGANIC MATERIALS,2010,25(8):887-892.
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文件名: synthesis and electrochemical characterizations of zinc-doped lifepo4c by carbothermal reduction.pdf
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