Exceptionally durable CoFe-exsolved Sr0.95Nb0.1Co0.7Fe0.2O3-delta catalyst for rechargeable Zn-air batteries

Kim, Sangwoo ¹Jung, Ji-Won ²Song, DongHoon ¹Cho, Su-Ho ¹Kim, Jiyeon ¹Kim, Jun Kyu ¹Oh, DongHwan ¹Sun, Hainan ¹Cho, EunAe ¹Kim, Il-Doo ¹Jung, WooChul¹

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作者信息

1. Korea Adv Inst Sci & Technol
2. Univ Ulsan
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Abstract

The lack of bifunctional features of perovskite oxide toward the oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) significantly limits its use as a cathode catalyst for rechargeable Zn-air batteries (ZABs). Thus far, numerous techniques to disperse additional catalysts on a perovskite host have been suggested to overcome this problem; however, cost-effectiveness and catalyst lifespan remain unsatisfactory. Herein, we present cobalt-based-nanoparticle-decorated Sr0.95Nb0.1Co0.7Fe0.2O3-delta (S0.95NCF) by a simple ex-solution method and use it as a novel air-electrode catalyst. We successfully implemented the socketed nanoparticles with various compositions at different reduction temperatures, achieving notably enhanced activity towards OER and ORR. More importantly, the newly designed catalyst exhibits record-high charge/discharge durability over 500 h (or 1500 consequent cycles) when used as the ZABs cathode. Our findings provide essential guidelines for designing heterostructured electrocatalysts for future energy devices, in which multifunctionality is desirable.

Key words

Zinc-air battery/Oxygen evolution reaction/Oxygen reduction reaction/Alkaline electrolyte/Ex-solution/OXYGEN EVOLUTION REACTION/OXIDE CATALYSTS/FUEL-CELLS/PEROVSKITE/ELECTROCATALYST/NANOPARTICLES/REDUCTION/BENCHMARKING/DISSOLUTION/NANOFIBERS

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出版年

2022

Applied Catalysis

ISSN：0926-3373

被引量14

参考文献量63

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