Journal
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
Volume 810, Issue -, Pages 248-254Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jelechem.2018.01.025
Keywords
Fe3O4 nanospheres; Surfactant; Fe3O4/C nanospheres; Lithium-ion batterie
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Funding
- National Natural Science Foundation of China [51572052]
- Natural Science Foundation of Heilongjiang Province of China [LC2015004]
- China Postdoctoral Science Special Foundation [2015T80329]
- Major Project of Science and Technology of Heilongjiang Province [GA14A101]
- Project of Research and Development of Applied Technology of Harbin [2014DB4AG016]
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Fe3O4 nanospheres are synthesized by a solvothermal method with only one step under the assistance of surfactant. Fe3O4/C nanospheres are further fabricated by modifying Fe3O4 nanospheres with glucose as carbon source. The crystalline structure and surface morphology are investigated by a combination of X-ray diffraction, Roman spectroscopy, transmission electron microscopy and scanning electron microscopy. The results suggest that cubic Fe3O4 nanospheres are achieved, with a diameter around 200 nm. After the coating process, uniform carbon layer similar to 5 nm is formed on the surface of Fe3O4 spheres. The electrochemical performances of prepared Fe3O4 and Fe3O4/C nanospheres as anode materials for lithium-ion batteries are conducted via galvanostatic discharge/charge measurements and cyclic voltammetry. Under a current density of 100 mA g(-1), the Fe3O4/C nanospheres exhibit a delithiation capacity of 767.2 mAh g(-1) over 100 cycles with excellent capacity retention of 98.2% and improved rate capacities, both of which are better than those of Fe3O4 nanospheres. This work demonstrates that the prepared Fe3O4/C nanospheres can be a promising anode material for lithium ion batteries.
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