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Ultra-high voltage efficiency rechargeable zinc-air battery based on high-performance structurally regulated metal-rich nickel phosphides and carbon hybrids bifunctional electrocatalysts
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J
DOI：10.1016/j.apcatb.2022.122041.png)
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Abstract
En 中文
Metal phosphides featuring electronic structure similar to Pt-group metal have triggered substantial concerns, and unveiling active species is crucial to rational design of bifunctional catalysts for ORR and OER. Herein, a hybrid of metal-rich nickel phosphides strongly coupled with heteroatom-doped carbon (NixP-NP-C) is con-structed by a facile pyrolysis combined with in-situ phosphorization of MOFs. This unique hybrid exhibits su-perior electrocatalytic activity and stability toward ORR and OER demonstrated by delightful high Eonset and E1/2 up to 0.90 and 0.76 V, respectively, along with a long-term stability. The resulting zinc-air battery shows an impressively small charge-discharge voltage gap and delivers a high power density of 266 mW cm-2. The high catalytic performance of NixP-NP-C can be ascribed to synergistic effect of metal-rich Ni2P actives and hetero-atoms doped porous carbon. Consequently, hybrid of carbon and metal phosphides may provide a meaningful reference for developing high performance oxygen catalysts in metal-air battery.
Keywords:
Metal phosphides
Porous carbon
Oxygen reduction
Oxygen evolution
Zn -air battery
Journal
A
IF:
20.3
Papers:
215
Citations:
16.3W
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Cited Papers