Cobalt Phosphosulfide Nanoparticles Encapsulated into Heteroatom-Doped Carbon as Bifunctional Electrocatalyst for Zn-Air Battery

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:
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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