1. Improvement in the electrochemical properties of LiNi0.5Mn1.5O4 lithium-ion battery cathodes prepared by a modified low temperature solution combustion synthesis.
- Author
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Xin Kong, Hongyan Sun, Quanbiao Wang, Zhongzhou Yi, Wang, Baosen, and Guiyang Liu
- Subjects
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ELECTROCHEMICAL analysis , *LITHIUM-ion batteries , *LITHIUM compounds , *CATHODES , *METALS at low temperatures , *SOLUTION (Chemistry) , *METAL microstructure - Abstract
The LiNi0.5Mn1.5O4 (LNM) spinel lithium-ion battery cathodes were prepared by a modified low temperature solution combustion synthesis method at 600 °C for 3 h. Structural analyses reveal that the modified method is an effective process to eliminate an impurity phase. In comparison with the LNM prepared by a conventional method, the modified sample has higher purity, better crystallinity, smaller amount of Mn3+ ions and higher structural ordering. It exhibits remarkably superior initial discharge specific capacity of 117.0 mAh/g, and delivers a reversible capacity of ~116.0, 116.6, 113.8, 108.9 and 85.9 mAh/g at 0.2 C, 0.5 C, 1 C, 2 C and 5 C, respectively. While the LNM prepared by the conventional method offers a lower reversible capacity of ~96.3, 95.4, 89.1, 77.0 and 40.6 mAh/g at the same rate. After 50 cycles, about 95.5% of reversible capacity is retained for the LNM prepared by modified method vs. 90.7% for the LNM prepared by the conventional method. It suggests that the modified method is a simple and effective method to prepare LiNi0.5Mn1.5O4 with high performance at low temperature and in short time. [ABSTRACT FROM AUTHOR]
- Published
- 2014
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