期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 4, 期 7, 页码 2729-2737出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5ta10414a
关键词
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资金
- Applied Fundamental Foundation of Sichuan Province [2014JY0202]
- R&D Foundation of China Academy of Engineering Physics [2014B0302036]
- Science Foundation for Distinguished Young Scholars of Sichuan Province [2016JQ0025]
- National Natural Science Foundation of China [21401177, 21501160]
- Chinese Government
- Collaborative Innovation Foundation of Sichuan University [XTCS2014009]
Tailoring the nanostructures of electrode materials is an effective way to enhance their electrochemical performance for energy storage. Herein, an ice-templating bricks-and-mortar assembly approach is reported to make ribbon-like V2O5 nanoparticles and CNTs integrated into a two-dimensional (2D) porous sheet-like V2O5-CNT nanocomposite. The obtained sheet-like V2O5-CNT nanocomposite possesses unique structural characteristics, including a hierarchical porous structure, 2D morphology, large specific surface area and internal conducting networks, which lead to superior electrochemical performances in terms of long-term cyclability and significantly enhanced rate capability when used as a cathode material for LIBs. The sheet-like V2O5-CNT nanocomposite can charge/discharge at high rates of 5C, 10C and 20C, with discharge capacities of approximately 240 mA h g(-1), 180 mA h g(-1), and 160 mA h g(-1), respectively. It also retains 71% of the initial discharge capacity after 300 cycles at a high rate of 5C, with only 0.097% capacity loss per cycle. The rate capability and cycling performance of the sheet-like V2O5-CNT nanocomposite are significantly better than those of commercial V2O5 and most of the reported V2O5 nanocomposite.
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