Abstract
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, Ni 3 Fe alloy nanoparticles incorporated in three-dimensional (3D) carbon nanotube (CNT)/graphene nanosheet composites with N and S codoping (Ni 3 Fe/N-S-CNTs) as bifunctional oxygen electrode electrocatalysts for zinc-air battery. The main particle size of Ni 3 Fe 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 Ni 3 Fe nanoparticles. On the basis of the synergistic effect of Ni 3 Fe nanoparticles with N-S-CNTs, and the sufficient exposure of reactive sites, the synthesized Ni 3 Fe/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.
Original language | English |
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Pages (from-to) | 38093-38100 |
Number of pages | 8 |
Journal | ACS Applied Materials and Interfaces |
Volume | 10 |
Issue number | 44 |
DOIs | |
Publication status | Published - 7 Nov 2018 |
Keywords
- bifunctional electrocatalyst
- heteroatom-doped carbon material
- NiFe-based
- synergistic effects
- Zn-air battery
ASJC Scopus subject areas
- Materials Science(all)