期刊
ACS APPLIED MATERIALS & INTERFACES
卷 10, 期 44, 页码 38093-38100出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.8b13751
关键词
Zn-air battery; bifunctional electrocatalyst; heteroatom-doped carbon material; NiFe-based; synergistic effects
资金
- National Natural Science Foundation [21573083]
- Hong Kong Research Grants Council through the Early Career Scheme [25301617]
- Hong Kong Polytechnic University Grant [1-ZE6G]
Exploring bifunctional oxygen electrode catalysts with efficient and stable oxygen reduction reaction (ORR)/oxygen evolution reaction (OER) performance is one of the limitations for high-performance zinc-air battery. In this work, Ni3Fe alloy nanoparticles incorporated in three-dimensional (3D) carbon nanotube (CNT)/graphene nanosheet composites with N and S codoping (Ni3Fe/N-S-CNTs) as bifunctional oxygen electrode electrocatalysts for zinc-air battery. The main particle size of Ni3Fe nanoparticles could be well restricted because of the unique 3D structure of carbon nanotube/graphene nanosheet composites (N-S-CNTs). The large specific area of N-S-CNTs is conducive to the uniform dispersion of Ni3Fe nanoparticles. On the basis of the synergistic effect of Ni3Fe nanoparticles with N-S-CNTs, and the sufficient exposure of reactive sites, the synthesized Ni3Fe/N-S-CNTs catalyst exhibits excellent OER performance with a low overpotential of 215 mV at 10 mA cm(-2), and efficient ORR activity with a half-wave potential of 0.877 V. When used as an electrocatalyst in zinc-air battery, the device exhibits a power density of 180.0 mW cm(-2) and long term durability for 500 h.
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