期刊
ADVANCED MATERIALS
卷 32, 期 28, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.202002170
关键词
macroporous carbon; oxygen electrocatalysts; zeolitic-imidazole frameworks; zinc-air batteries
类别
资金
- National Natural Science Foundation of China [21805104, 21802048]
- National 1000 Young Talents Program of China
- Fundamental Research Funds for the Central Universities [2018KFYXKJC044, 2018KFYYXJJ121, 2017KFXKJC002]
- WNLO of HUST
Nanostructures derived from zeolitic-imidazole frameworks (ZIFs) gain much interest in bifunctional oxygen electrocatalysis. However, they are not satisfied well for long-life rechargeable zinc-air batteries due to the limited single particle morphology. Herein, the preparation of an interconnected macroporous carbon matrix with a well-defined 3D architecture by the pyrolysis of silica templated ZIF-67 assemblies is reported. The matrix catalyst assembled zinc-air battery exhibits a high power density of 221.1 mW cm(-2) as well as excellent stability during 500 discharging/charging cycles, surpassing that of a commercial Pt/C assembled battery. The synergistic effect from the interconnected macroporous structure together with abundant cobalt-nitrogen-carbon active sites justify the excellent electrocatalytic activity and battery performance. Considering the advanced nanostructures and performance, the as-synthesized hybrid would be promising for rechargeable zinc-air batteries and other energy technologies. This work may also provide significant concept in the view of electrocatalysis design for long-life battery.
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