期刊
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
卷 67, 期 -, 页码 116-126出版社
JOURNAL MATER SCI TECHNOL
DOI: 10.1016/j.jmst.2020.06.028
关键词
Carbon nanofiber; Nanostructure; Composite anode; Zeolitic imidazolate framework
资金
- Technology Development Program to Solve Climate Changes of the National Research Foundation (NRF) - Ministry of Science, ICT & Future Planning [NRF-2016M1A2A2936760]
- National Research Foundation of Korea (NRF) - Korea government(MSIP) through Advanced Space Propulsion Research Center at Seoul National University [NRF-2013R1A5A1073861]
- King Saud University [RG-1440-111]
Carbon nanofibers loaded with bimetallic hollow nanocage structures were synthesized and evaluated as anode materials for lithium-ion batteries. The composite anodes exhibited higher capacity and long-term stability, making them promising materials for use in portable LIBs.
Freestanding carbon nanofibers loaded with bimetallic hollow nanocage structures were synthesized. The nanocages inherited the rhombic dodecahedral morphology of the zeolitic imidazolate framework (ZIF) precursors, ZIF-8 and ZIF-67. As anode materials for lithium-ion batteries (LIBs), the bimetallic nanocage-loaded freestanding carbon nanofibers effectively buffered volume expansions and alleviated pulverization through their different reduction and oxidation potentials. The higher capacities of the composite anodes arose via the formation of the LixZn alloy and Li2O by Zn and Co ions, respectively, and the enhanced conductivity conferred by the carbon nanofibers. A synergistic effect of the composite components toward the strong electrochemical performance (688 mA h.g(-1) at 1200 mA.g(-1)) of the bimetallic nanocage-loaded fibers was demonstrated through the superior long-term stability of the anode (1048 mA h.g(-1) after 300 cycles at 100 mA.g(-1)), suggesting that the fabricated anode can be a promising material for use in portable LIBs. (C) 2021 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
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