Journal
JOURNAL OF MATERIALS CHEMISTRY A
Volume 1, Issue 40, Pages 12650-12656Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3ta12106b
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Funding
- Program of National 973 [2011CB935900]
- NSFC [21231005]
- 111 Project [B12015]
- Tianjin High-Tech [13JCQNJC06400]
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In this paper, we report on the preparation of a Li2MnSiO4@C nanocomposite and its application as a high-capacity cathode material for rechargeable Li-ion batteries. Li2MnSiO4@C was synthesized via a hydrothermal-assisted solution route by using ascorbic acid as a carbon source and reductant. Based on the characterization by XRD, SEM, TEM, BET, elemental analysis and Raman analysis, it was found that the as-obtained homogenous Li2MnSiO4@C nanocomposite was composed of a Li2MnSiO4 core in a high-purity phase and a graphitized carbon shell. The electrochemical measurement results showed that Li2MnSiO4@C with an average particle size of 22.8 nm exhibited enhanced electrochemical properties, with initial discharge capacities of 281.5 mA h g(-1) at 25 degrees C and 321.4 mA h g(-1) at 45 degrees C, suggesting two lithium ions per formula unit.
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