Research Article

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2016, 9(1): 128–138

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https://doi.org/10.1007/s12274-015-0896-6

Carbon-supported and nanosheet-assembled vanadium oxide microspheres for stable lithium-ion battery anodes

Chaojiang Niu§, Meng Huang§, Peiyao Wang§, Jiashen Meng, Xiong Liu, Xuanpeng Wang, Kangning Zhao, Yang Yu, Yuzhu Wu, Chao Lin, and Liqiang Mai (*)

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State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China
§ These authors contributed equally to this work.

Keywords: vanadium oxide, microspheres, amorphous, lithium-ion battery, anodes
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  • Abstract
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Naturally abundant transition metal oxides with high theoretical capacity have attracted more attention than commercial graphite for use as anodes in lithium-ion batteries. Lithium-ion battery electrodes that exhibit excellent electrochemical performance can be efficiently achieved via three-dimensional (3D) architectures decorated with conductive polymers and carbon. As such, we developed 3D carbon-supported amorphous vanadium oxide microspheres and crystalline V2O3 microspheres via a facile solvothermal method. Both samples were assembled with ultrathin nanosheets, which consisted of uniformly distributed vanadium oxides and carbon. The formation processes were clearly revealed through a series of time-dependent experiments. These microspheres have numerous active reaction sites, high electronic conductivity, and excellent structural stability, which are all far superior to those of other lithium-ion battery anodes. More importantly, 95% of the second-cycle discharge capacity was retained after the amorphous microspheres were subjected to 7,000 cycles at a high rate of 2,000 mA/g. The crystalline microspheres also exhibited a high-rate and long-life performance, as evidenced by a 98% retention of the second-cycle discharge capacity after 9,000 cycles at a rate of 2,000 mA/g. Therefore, this facile solvothermal method as well as unique carbon-supported and nanosheet-assembled microspheres have significant potential for the synthesis of and use in, respectively, lithium-ion batteries.
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Carbon-supported and nanosheet-assembled vanadium oxide microspheres for stable lithium-ion battery anodes. Nano Res. 2016, 9(1): 128–138 https://doi.org/10.1007/s12274-015-0896-6

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