Xu, Xiaolong, Wang, Shuo, Guo, Shiquan, San Hui, Kwan, Ma, Jiameng, Dinh, Duc Anh, Hui, Kwun Nam, Wang, Hao, Zhang, Lipeng and Zhou, Guowei (2021) Cobalt Phosphosulfide Nanoparticles Encapsulated into Heteroatom-Doped Carbon as Bifunctional Electrocatalyst for Zn-Air Battery. Advanced Powder Materials. ISSN 2772-834X

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Abstract

The design of non‐noble electrocatalysts with low overpotential, high effectiveness, and good cycling stability for oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) is highly desirable for high-performance Zn–air batteries. Herein, CoPS nanoparticles encapsulated with S, P, N tri-doped carbon material (SPNC) is proposed as bifunctional electrocatalyst of ORR and OER derived from zeolitic imidazolate framework-67. Density functional theory calculations consistently reveal that P element in CoPS@SPNC improve the electrical conductivity and reduce OH* hydrogenation energy barrier on Co sites, thereby facilitating the overall ORR/OER activities. A flexible Zn–air battery with CoPS@SPNC delivers an overpotential of 0.49 V, an energy efficiency above 80%, and a discharge voltage of 1.29 V at 2 mA cm−2 for 80 h. Such strategy could provide numerous possibilities for the design of highly efficient electrocatalysts.

Item Type:	Article
Uncontrolled Keywords:	sdg 7 - affordable and clean energy ,/dk/atira/pure/sustainabledevelopmentgoals/affordable_and_clean_energy
Faculty \ School:	Faculty of Science > School of Pharmacy
Related URLs:	https://linkinghub.elsevier.com/retrieve...
Depositing User:	LivePure Connector
Date Deposited:	07 Jan 2022 16:30
Last Modified:	10 Jan 2022 01:15
URI:	https://ueaeprints.uea.ac.uk/id/eprint/82921
DOI:	10.1016/j.apmate.2021.12.003

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