Journal
JOURNAL OF POWER SOURCES
Volume 231, Issue -, Pages 39-43Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2012.12.071
Keywords
Citric acid; Solid-state reaction; Long cycle life; Nanocomposite
Funding
- National Natural Science Fund of China [91022033, 21203111]
- 973 Project of China [2011CB935901]
- Shandong Provincial Natural Science Foundation for Distinguished Young Scholar [JQ201205]
- Independent Innovation Foundation of Shandong University [2012 ZD007]
- Shandong University
- China Postdoctoral Science Foundation [2012M511490]
- Special Fund for Postdoctoral Innovation Program of Shandong Province [201102022]
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The Li2MnSiO4/C nanocomposite has been successfully synthesized at a relatively low temperature of 650 degrees C by a facile solid-state reaction using citric acid as the carbon source. The highly crystalline Li2MnSiO4 nanoparticles in the size of 20-50 nm are coated by a uniform carbon layer in a thickness of 2-5 nm. At a rate of 0.05 C, the Li2MnSiO4/C nanocomposite exhibits a discharge specific capacity as high as 268 mAh g(-1) for the first cycle and a reversible capacity of about 136 mAh g(-1) after 140 cycles at room temperature. Meanwhile, an improved rate performance is achieved by the Li2MnSiO4/C nanocomposite. These superior electrochemical properties could be attributed to the nanoscale particle size and the enhanced electronic conductivity. (C) 2012 Elsevier B.V. All rights reserved.
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