1. Electrochemical Performance of α-LiVOPO4/Carbon Composite Material Synthesized by Sol-Gel Method.
- Author
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Anping Tang, Jie Shen, Yongjun Hu, Guorong Xu, Donghua He, Qingfeng Yi, and Ronghua Peng
- Subjects
SOL-gel processes ,CARBON composites ,GALVANOSTAT ,COMPOSITE materials synthesis ,LITHIUM ions - Abstract
LiVOPO
4 /carbon composite materials were prepared at a moderate temperature of 400°C by oxalic acid assisted sol-gel technique and acetylene black acting as a carbon source. The as synthesized composite materials were characterized by XRD, SEM, galvanostatic charge-discharge and CV measurements. When tested at 0.1 C rate for Li ion insertion properties. α-LiVOPO4 / carbon composite material exhibits good cycle capability with an average capacity degradation of just 0.05 mAh/g per cycle. Additionally, when the various discharge rates were applied progressively for each of ten cycles, it shows excellent rate capability with initial discharge capacities of 138 mAh/g (0.1 C), 134 mAh/g (0.2 C), 108 mAh/g (0.5 C) and 83 mAh/g (1 C), respectively, indicating that carbon modification could enhance the electronic conductivity of LiVOPO4 . [ABSTRACT FROM AUTHOR]- Published
- 2014
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