期刊
ELECTROCHIMICA ACTA
卷 91, 期 -, 页码 43-49出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2012.12.090
关键词
Lithium vanadium phosphate; Morphology; Hydrothermal method; Low temperature performance; Lithium ion battery
资金
- National Science Foundation of China [20971117, 10979049, J1030412]
- Education Department of Anhui Province [KJ2009A142]
A plate-like carbon-coated Li3V2(PO4)(3) (LVP/C) powder composed of nanoplates was synthesized by a hydrothermal route. The structure and electrochemical properties of the LVP/C are characterized by X-ray diffraction, scanning and transmission electron microscopy, and galvanostatic charge-discharge cycling. This LVP/C electrode exhibits good rate performance at room temperature with a specific capacity of 113.8 and 128.8 mAh g(-1) at 6 C rate in the voltage range of 3.0-4.3V and 3.0-4.8V, respectively. The sample also shows good cycling performance with 91.4% and 85% of capacity retention after 200 cycles at IC rate. Even at -20 degrees C, the plate-like LVP/C delivers a stable cycling performance with a specific capacity of 120.7 mAh g(-1), being 95.3% of the capacity at room temperature, and after 80 cycles, the capacity retention is 97.2%. (C) 2012 Elsevier Ltd. All rights reserved.
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