Back to Search
Start Over
Improvement in the electrochemical properties of LiNi0.5Mn1.5O4 lithium-ion battery cathodes prepared by a modified low temperature solution combustion synthesis.
- Source :
-
Ceramics International . Sep2014, Vol. 40 Issue 8 Part A, p11611-11617. 7p. - Publication Year :
- 2014
-
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]
Details
- Language :
- English
- ISSN :
- 02728842
- Volume :
- 40
- Issue :
- 8 Part A
- Database :
- Academic Search Index
- Journal :
- Ceramics International
- Publication Type :
- Academic Journal
- Accession number :
- 96999536
- Full Text :
- https://doi.org/10.1016/j.ceramint.2014.03.144