期刊
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
卷 9, 期 42, 页码 14193-14201出版社
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.1c04675
关键词
Porous ultrathin nanosheet; W-doped VO2; Enlarged lattice distance; W-O bond; Zinc-ion batteries
资金
- National Key Research and Development Program of China [2017YFA0206703]
- National Natural Science Foundation of China [22076049, 11474101]
- Fundamental Research Funds for the Central Universities of China [D2191120]
- Guangdong Innovative and Entrepreneurial Research Team Program [2014ZT05N200]
The study successfully developed W-VO2 nanosheets as cathode materials for ZIBs through a hydrothermal self-assembly strategy, which exhibited excellent electrochemical performance and cycling stability, providing a new approach for the development of ZIBs.
Aqueous rechargeable zinc-ion batteries (ZIBs) are identified as promising candidates in energy storage devices because of their high safety, green property, natural abundance, and low cost, whereas, the design of an ideal cathode material with a large specific capacity, superior rate performance, and long-life cycle is still a great challenge for ZIBs. Herein, a facile hydrothermal self-assembly strategy is developed to construct tungsten-doped vanadium dioxide (W-VO2) nanosheets as the cathode materials of ZIBs. Porous ultrathin nanosheet structure, enlarged lattice distance, and W-O bond formation endow the Zn2+ ion rapid diffusion and enhance structural stability during the electrochemical operation. As a result, the W-VO2 cathode exhibits an initial capacity of 346 mA h g(-1) at 100 mA g(-1), an impressive rate capability of 221 mA h g(-1) at 10 A g(-1), and an appreciable 76.4% capacity retention after 1000 cycles at 4 A g(-1). This work provides an efficient, green, and feasible approach for the design of high-performance cathode materials toward clean aqueous ZIBs.
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