期刊
JOURNAL OF PHYSICAL CHEMISTRY C
卷 124, 期 44, 页码 24073-24080出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpcc.0c06899
关键词
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资金
- National Natural Science Foundation of China [21771154]
- Natural Science Foundation of Fujian Province of China [2018J01019, 2018J05025]
- Shenzhen Fundamental Research Programs [JCYJ20190809161013453]
- Fundamental Research Funds for the Central Universities [20720180019, 20720180016]
Vanadium (III) oxide nanomaterials have been investigated and considered as potential anode materials for Li-ion batteries (LIBs). Fabrication of two-dimensional (2D) mesoporous nanomeshes from carbon-encapsulated V2O3, though is technically challenging, can further enhance its electrochemical performances due to the shortening of the Li+-ion diffusion distance, the highly conductive pathway for electrons, and the tremendous increase of surface areas. In this paper, an ice-templated assembly approach is utilized to fabricate a 2D mesoporous nanomesh from N-doped carbon-encapsulated V2O3 (V2O3@N-C Nm). The V2O3@N-C Nm anode exhibits a highly reversible capacity of similar to 651 mA h g(-1) at a current density of 200 mA g(-1) over 100 cycles, which is 2.5 times and 1.3 times higher than those of V2O3 Nm and V2O3@N-C nanocomposite (V2O3@N-C Nc), respectively. The superior electrochemical performances of V2O3@N-C Nm are mainly due to its unique nanomesh nanostructure, which facilitates the lithiation/delithiation process, alleviates structural collapse, enhances electrical conductivity, and provides efficient diffusion channels.
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