期刊
ACS APPLIED MATERIALS & INTERFACES
卷 12, 期 40, 页码 44710-44719出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.0c11945
关键词
Fe-MOF-derived composite; honeycomb FeS/Fe3C@NS-C; ORR/OER bifunction; rechargeable zinc air battery; long life cycle stability
资金
- NNSF of China [21771095, 21571092, 21601079]
- NSF of Shandong Province [ZR2017JL013, ZR2019MEM030]
- Youth Innovation Team of Shandong Colleges and Universities [2019KJC027]
The construction of an efficient oxygen reduction reaction and oxygen evolution reaction (ORR/OER) bifunctional electrocatalyst is of great significance but still remains a giant challenge for high-performance metal-air batteries. In this study, uniform FeS/Fe3C nanoparticles embedded in a porous N,S-dual doped carbon honeycomb-like composite (abbr. FeS/Fe3C@NS-C-900) have been conveniently fabricated by pyrolysis of a single-crystal Fe-MOF, which has a low potential gap Delta E of ca. 0.72 V, a competitive power density of 90.9 mW/cm(2), a specific capacity as high as 750 mAh/gZn, and excellent cycling stabilities over 865 h (1730 cycles) at 2 mA/cm(2) when applied as a cathode material for rechargeable zinc-air batteries. In addition, the two series-linked Zn-air batteries successfully powered a 2.4 V LED light as a real power source. The efficient ORR/OER bifunctional electrocatalytic activity and long-term durability of the obtained composite might be attributed to the characteristic honeycomb-like porous structure with sufficient accessible active sites, the synergistic effect of FeS and Fe3C, and the N,S codopedporous carbon, which provides a promising application potential for portable electronic Zn-air battery related devices.
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