期刊
CHINESE JOURNAL OF CHEMISTRY
卷 39, 期 9, 页码 2599-2606出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cjoc.202100192
关键词
Metal-organic frameworks; Nanostructures; Kinetics; Co0 5Ni0 5Se2@NC; Sodium-Ion Batteries
资金
- National Natural Science Foundation of China [51563002]
- 100-level Innovative Talents Project of Guizhou Province China [[2016]5653]
- Science and Technology Planning Project of Guangzhou Provinceince [202102010373]
Hierarchical Co0.5Ni0.5Se2@NC architecture with high electrochemical performance was successfully prepared, showing potential for sodium-ion batteries and energy storage systems.
Main observation and conclusion Exploration of advanced anode materials for sodium-ion batteries (SIBs) is still a big challenge due to the large radius of sodium. In this work, the hierarchical architectures assembled from N-doped carbon-coated Co0.5Ni0.5Se2 (Co0.5Ni0.5Se2@NC) nanoparticles encapsulated into cross-stacked nanosheets have been successfully prepared from the cobalt-nickel binary-metal organic frameworks (CoNi-MOF) by two steps of the solid-state selenization and carbon coating processes. Importantly, the resultant hierarchical Co0.5Ni0.5Se2@NC architecture can achieve a satisfactory electrochemical performance, maintaining a high-rate capacity of 330 mA center dot h center dot g(-1) at 3 A center dot g(-1) and a stable cyclability of 100 cycles without obvious capacity decay at 0.2 A center dot g(-1). The design of distinct superstructure can not only be applied to other electrode materials but also boost the forward development of energy storage systems.
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