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题名:
low-temperature behavior of li3v2(po 4)3/c as cathode material for lithium ion batteries
作者: Liu Zhiqiang; Kang Xueya; Li Chengfeng; Hua Ning; Wumair Tuerdi; Han Ying
会议文集: Journal of Solid State Electrochemistry
会议名称: ICMAT Symposium N
会议日期: JUN 26-JUL 01, 2011
出版日期: 2012
会议地点: SINGAPORE
关键词: Lithium vanadium phosphate ; Low-temperature electrochemical performance ; Cathode ; Carbon coating ; Lithium ion battery
出版者: JOURNAL OF SOLID STATE ELECTROCHEMISTRY
出版地: United States
英文摘要:

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.

内容类型: 会议论文
URI标识: http://ir.xjipc.cas.cn/handle/365002/2296
Appears in Collections:材料物理与化学研究室_会议论文

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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:
Liu Zhiqiang,Kang Xueya,Li Chengfeng,et al. low-temperature behavior of li3v2(po 4)3/c as cathode material for lithium ion batteries[C]. 见:ICMAT Symposium N. SINGAPORE. JUN 26-JUL 01, 2011.
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