期刊
NANO ENERGY
卷 62, 期 -, 页码 876-882出版社
ELSEVIER
DOI: 10.1016/j.nanoen.2019.06.009
关键词
Metal organic framework; Ultrathin nanosheets; Rechargeable alkaline battery; Interplanar space
类别
资金
- Doctoral Scientific Research Fund of Xi'an University of Technology, Natural Science Basic Research Plan in Shaanxi Province of China [2018JQ5202]
- Shaanxi Provincial Department of Education [18JK0550]
- National Natural Science Foundation of China [21304074]
- Shaanxi Province Key Laboratory Open Project of Polymer Science and Technology [2013SZS17-K01]
- China National Funds for Excellent Young Scientists [21522106]
- National Key R&D Program of China [2017YFA0208000]
- 111 Project from China [B18030]
- US DOE Office of Science Facility [DE-SC0012704]
Hydroxides and their derivatives as cathode materials of rechargeable alkaline batteries have limited specific capacity. In this work, a new ultrathin metal organic framework (MOF) nanosheet with expanded interplanar space is delicately designed. The organic ligand as a pillar enlarges the interplanar space for ion transportation to Ni/Co redox centers. The obtained NiCo-MOF cathode has high capacity and rate retention, specifically, 225 mAh g(-1) and 82% capacity retention from 1 to 20 A g(-1), which is over four-fold to that of NiCo-LDH. A full cell composed of NiCo-MOF cathode and an organic anode shows high capacity of 280 mAh g(-1) with long-term cycle stability. Furthermore, we find electrochemical performance increases linearly with larger interplanar space. The present results can give new insight into structure design for advanced cathode materials and understanding the relationship between structures and performance of alkaline batteries.
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