期刊
ADVANCED ENERGY MATERIALS
卷 8, 期 26, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/aenm.201801445
关键词
cathode materials; high performance; mechanism study; mild aqueous electrolyte; zinc-ion batteries
类别
资金
- Natural Sciences and Engineering Research Council of Canada (NSERC)
- Fonds de Recherche du Quebec-Nature et Technologies (FRQNT)
- Canada Foundation for Innovation (CFI)
- Centre Quebecois sur les Materiaux Fonctionnels (CQMF)
- National Natural Science Foundation of China [51572184, U1710256]
- Institut National de la Recherche Scientifique (INRS)
- China Scholarship Council (CSC)
- CFI
- NSERC
- University of Saskatchewan
- Government of Saskatchewan
- Western Economic Diversification Canada
- National Research Council Canada
- Canadian Institutes of Health Research
- CLS Graduate and Post-Doctoral Student Travel Support Program
Rechargeable aqueous zinc-ion batteries (ZIBs) have been emerging as potential large-scale energy storage devices due to their high energy density, low cost, high safety, and environmental friendliness. However, the commonly used cathode materials in ZIBs exhibit poor electrochemical performance, such as significant capacity fading during long-term cycling and poor performance at high current rates, which significantly hinder the further development of ZIBs. Herein, a new and highly reversible Mn-based cathode material with porous framework and N-doping (MnOx@N-C) is prepared through a metal-organic framework template strategy. Benefiting from the unique porous structure, conductive carbon network, and the synergetic effect of Zn2+ and Mn2+ in electrolyte, the MnOx@N-C shows excellent cycling stability, good rate performance, and high reversibility for aqueous ZIBs. Specifically, it exhibits high capacity of 305 mAh g(-1) after 600 cycles at 500 mA g(-1) and maintains achievable capacity of 100 mAh g(-1) at a quite high rate of 2000 mA g(-1) with long-term cycling of up to 1600 cycles, which are superior to most reported ZIB cathode materials. Furthermore, insight into the Zn-storage mechanism in MnOx@N-C is systematically studied and discussed via multiple analytical methods. This study opens new opportunities for designing low-cost and high-performance rechargeable aqueous ZIBs.
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