Journal
NANO ENERGY
Volume 7, Issue -, Pages 1-9Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.nanoen.2014.04.005
Keywords
Li2Mn0.5Fe0.5SiO4; Hydrothermal synthesis; Electrochemical properties
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Funding
- 973 Project of China [2011CB935901]
- National Natural Science Foundation of China [21203111, 91022033]
- Shandong Provincial Natural Science Foundation for Distinguished Young Scholar [JQ201205]
- Independent Innovation Foundation of Shandong University [2012 ZD007]
- start-up funding for new faculties in Shandong University
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Hierarchical mesoporous Li2Mn0.5Fe0.5SiO4 consisted of nanoparticles or nanoplates has been successfully synthesized for the first time by a hydrothermal method. Their carbon-coated composites are obtained by a heat treatment in the presence of citric acid. These composites were characterized by powder X-ray diffractometry, scanning and transmission electron microscopy, Raman spectroscopy, and thermogravimetric analysis. The lithium storage capacity and cycling performance of the optimized Li2Mn0.5Fe0.5SiO4/C composite are greatly enhanced when tested as a cathode material in lithium-ion batteries (LIBs). It exhibits a discharge capacity of 125 mAh g(-1) after 60 cycles at a rate of 0.1 C. This superior electrochemical property could be ascribed to high purity and mesoporous structure of Li2Mn0.5Fe0.5SiO4, which greatly enhances the electronic conductivity as well as the diffusion coefficient of lithium ions. (C) 2014 Elsevier Ltd. All rights reserved.
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