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题名: Effect of Mn2+-doping in LiFePO4 and the low temperature electrochemical performances
作者: Li, Chengfeng; Hua, Ning; Wang, Chengyun; Kang, Xueya; Tuerdi Wumair; Han, Ying
通讯作者: Kang, XY
关键词: Olivine compound ; Electrochemical performance ; Low temperature performance ; Chelation assisted method ; Mn2+-doping
刊名: Journal of Alloys and Compounds
发表日期: 2011
DOI: 10.1016/j.jallcom.2010.10.083
卷: 509, 期:5, 页:1897-1900
收录类别: SCI ; EI
摘要: Olivine composites LiFe1-xMnxPO4/C (x = 0, 0.05, 0.1) were prepared by chelation assisted mechanochemical activation method using C2H2O4 as the chelating reagent. The structures of the prepared composites were characterized by X-ray diffraction (XRD). Cyclic voltammetry, ac impedance spectroscopy, galvanostatic charge/discharge performances were studied at room temperature. The discharge capacity of LiFe0.95Mn0.05PO4 was 155.6 mAh g-1 and 102.9 mAh g-1 at 1 C and 10 C rate, respectively. The results indicated Mn2+-doping in LiFePO4 could effectively enhance the electrochemical performances of this olivine compound especially at high charge/discharge rate. In addition, charge/discharge method was also used to characterize the low temperature properties of the different samples. The results showed that the lower the operation temperature was, the poorer the performances were. Furthermore, ac impedance measurement was used to understand the factors of the poor performances at low temperature.
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内容类型: 期刊论文
URI标识: http://ir.xjipc.cas.cn/handle/365002/4031
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 Xinjiang 830011, Peoples R China;Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China;Xinjiang Key Lab Elect Informat Mat & Devices, Urumqi Xinjiang 830011, Peoples R China

Recommended Citation:
Li, Chengfeng,Hua, Ning,Wang, Chengyun,et al. Effect of Mn2+-doping in LiFePO4 and the low temperature electrochemical performances[J]. Journal of Alloys and Compounds,2011,509(5):1897-1900.
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