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Low-temperature behavior of Li3V2(PO4)(3)/C as cathode material for lithium ion batteries
Liu, Zhiqiang; Kang, Xueya; Li, Chengfeng; Hua, Ning; Wumair, Tuerdi; Han, Ying
2012
会议名称ICMAT Symposium N
页码1917-1923
会议日期JUN 26-JUL 01, 2011
会议地点SINGAPORE
摘要

The electrochemical performance of Li3V2(PO 4)3/C was investigated at various low temperatures in the electrolyte 1.0 mol dm-3 LiPF6/ethyl carbonate (EC)+diethyl carbonate (DEC)+dimethyl carbonate (DMC) (volume ratio 1:1:1). The stable specific discharge capacity is 125.4, 122.6, 119.3, 116.6, 111.4, and 105.7 mAh g-1 at 26, 10, 0, -10, -20, and -30 °C, respectively, in the voltage range of 2.3-4.5 V at 0.2 C rate. When the temperature decreases from -30 to -40 °C, there is a rapid decline in the capacity from 105.7 to 69.5 mAh g-1, implying that there is a nonlinear relationship between the performance and temperature. With temperature decreasing, Rct (corresponding to charge transfer resistance) increases rapidly, D (the lithium ion diffusion coefficients) decreases sharply, and the performance of electrolyte degenerates obviously, illustrating that the lowtemperature electrochemical performance of Li3V2(PO4) 3/C is mainly limited by Rct, DLi, and electrolyte.

关键词Lithium Vanadium Phosphate Low-temperature Electrochemical Performance Cathode Carbon Coating Lithium Ion Battery
收录类别SCI
文献类型会议论文
条目标识符http://ir.xjipc.cas.cn/handle/365002/3612
专题材料物理与化学研究室
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
推荐引用方式
GB/T 7714
Liu, Zhiqiang,Kang, Xueya,Li, Chengfeng,et al. Low-temperature behavior of Li3V2(PO4)(3)/C as cathode material for lithium ion batteries[C],2012:1917-1923.
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