Preventing surface passivation of transition metal nanoparticles in oxygen electrocatalyst to extend the lifespan of Zn-air battery

Zhuo Peng ¹Changcun Han ¹Chuyun Huang ¹Zehua Dong ²Xinguo Ma¹

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作者信息

1. Hubei Collaborative Innovation Center for High-efficiency Utilization of Solar Energy,School of Science,Hubei University of Technology(HBUT),Wuhan 430068,China
2. Hubei Key Laboratory of Material Chemistry and Service Failure,Key laboratory of Material Chemistry for Energy Conversion and Storage(Ministry of Education),School of Chemistry and Chemical Engineering,Huazhong University of Science and Technology(HUST),Wuhan 430074,China
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Abstract

Prolonging the lifespan of oxygen catalysts in Zn-air batteries was urgently required for the potential commercialization.Herein,two interactional active species were integrated into porous N-doped carbon microspheres(Co-Fe-Ru/PNCS)to act as bifunctional oxygen electrocatalysts.Due to the electron transfer from Ru to Co/Fe element,the high value state of Ru could promote OER performance and reduce the charge voltage of the battery.An extended cycle stability of 200 h was achieved in Co-Fe-Ru/PNCS-based battery.Moreover,the quasi in-situ potentiodynamic sweep of air-electrode in battery cell confirmed it was the incorporation of Ru that avoided the passivation of Co/Fe-based nanoparticles.Accordingly,this novel electrocatalyst may provide a new strategy of designing durable bifunctional oxygen electrocatalyst for Zn-air batteries.

Key words

Prussian blue analogous/Bifunctional electrocatalysts/Zn-air batteries/Quasi in-situ electrochemical tests

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基金项目

research startup fund of Hubei University of Technology(XJ2021007701)

Nature Science Foundation of Hubei Province(2021CFB291)

Analytical and Testing Center of Huazhong University of Science and Technology for the electron microscopy()

出版年

2022

材料科学技术(英文版)

中国金属学会中国材料研究学会中国科学院金属研究所

材料科学技术(英文版)

CSTPCDCSCDSCI

影响因子：0.657

ISSN：1005-0302

参考文献量44

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