期刊
NANO ENERGY
卷 12, 期 -, 页码 1-8出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.nanoen.2014.11.043
关键词
Co3O4; N-doped carbon dodecahedrons; Porous structure; Lithium-ion batteries; Water splitting
类别
资金
- U.S. Department of Energy [DE-EE0003208]
- Research Growth Initiative Program of the University of Wisconsin-Milwaukee (UWM)
A novel Co3O4/N-doped porous carbon hybrid with dodecahedrons structure was synthesized by a facile, two-step, thermal transformation of a cobalt-based zeolitic imidazolate framework. Well-dispersed Co3O4 nanoparticles were embedded in nitrogen-doped porous carbon networks, forming a unique nanopolyhedron. When tested as anode material for lithium-ion batteries, the hybrid exhibited superior electrochemical performance, including excellent rate capability of 560 mA h g(-1) at 10 A g(-1) which is close to 46% of the rate capacity at 100 mA g(-1), outstanding cycling stability with 91.7% capacity retention of the second cycle after 110 cycles, and considerably large discharge capacity of 1730 mA h g(-1) at 100 mA g(-1). Moreover, the hybrid also showed enhanced electrocatalytic activity for electrochemical oxygen evolution from water splitting. (C) 2014 Elsevier Ltd. All rights reserved.
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