期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 4, 期 17, 页码 6282-6289出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6ta02030e
关键词
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资金
- Natural Science Foundation of China [21373060]
- Key Laboratory for Intelligent Nano Materials and Devices of the Ministry of Education [INMD-2014M04]
- State Key Basic Research Program of PRC [2014CB932301]
- Shanghai Science & Technology Committee [13JC1407900]
We synthesized RuO2-coated ordered mesoporous carbon nanofiber arrays (MCNAs) through a natural crab shell template, as a bifunctional catalyst for Zn-air batteries. The uniform RuO2-coating layer and ordered mesopores ensure high electrical conductivity and facilitate ion diffusion, respectively, which provide enough active sites for the ORR/OER; the macro-sized void spaces between carbon nanofibers not only play the role of a buffer in the reactions, but also facilitate oxygen transfer; the uniform RuO2-coating layer ensures catalytic activity and selectivity for catalyzing reactions (ORR and OER), especially the OER. As a result, this Zn-air battery exhibits much improved electrochemical performance, including relatively low overpotentials, long cycle life and superior rate capability.
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