期刊
RSC ADVANCES
卷 6, 期 102, 页码 99695-99703出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6ra22105j
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资金
- National Natural Science Foundation of China [51672234]
- Research Foundation of Education Bureau of Hunan Province [15B229]
- Research Foundation for Hunan Youth Outstanding People from Hunan Provincial Science and Technology Department [2015RS4030]
- Hunan Provincial Natural Science Foundation of China [14JJ6017]
- Program for Innovative Research Cultivation Team in University of the Ministry of Education of China [1337304]
Ti3+-Doped anatase TiO2@C composite spheres (TD-TiO2@C) are synthesized for the first time by the solvothermal method, followed by calcination using as-prepared anatase/TiO2-B hybrid TiO2 spheres and glycerol solution in alcohol as reactants. TD-TiO2@C spheres exhibit excellent electrochemical performance as anode materials for lithium ion batteries (LIBs). The electrodes not only exhibit a superior capacity of 244.80 mA h g(-1) at 1C (0.168 A g(-1)) after 100 cycles, but also show an eminent rate capability. TD-TiO2@C spheres retain discharge capacities of 171.78, 143.45, 119.17, 105.82 mA h g(-1) after 500 cycles at 5C, 10C, 20C, 30C, holding a capacity retention as high as 91.0%, 84.2%, 82.1%, 82.0% when compared with discharge capacities at the 10th cycle, respectively. The improved electrochemical properties are mainly due to the synergistic effects of carbon coating and Ti3+ doping, which can enhance significantly the inherent electronic conductivity of TiO2. Therefore, TD-TiO2@C can be an attractive candidate for anode materials in LIBs, also with great promise.
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