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Cobalt phosphosulfide nanoparticles encapsulated into heteroatom-doped carbon as bifunctional electrocatalyst for Zn−air battery

Xiaolong Xu, Shuo Wang, Shiquan Guo, Kwan San Hui, Jiameng Ma, Duc Anh Dinh, Kwun Nam Hui, Hao Wang, Lipeng Zhang, Guowei Zhou

    Research output: Contribution to journalArticlepeer-review

    122 Citations (Scopus)
    20 Downloads (Pure)

    Abstract

    CoPS nanoparticles encapsulated with S, P, N tri-doped carbon material (SPNC) were proposed as bifunctional electrocatalyst of oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) derived from zeolitic imidazolate framework-67. Density functional theory calculations consistently revealed that P element in CoPS@SPNC improves the electrical conductivity and reduces OH∗ hydrogenation energy barrier on Co sites, thereby facilitating the overall ORR/OER activities. A flexible Zn–air battery with CoPS@SPNC delivered 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.
    Original languageEnglish
    Article number100027
    JournalAdvanced Powder Materials
    Volume1
    Issue number3
    Early online date23 Dec 2021
    DOIs
    Publication statusPublished - Jul 2022

    UN SDGs

    This output contributes to the following UN Sustainable Development Goals (SDGs)

    1. SDG 7 - Affordable and Clean Energy
      SDG 7 Affordable and Clean Energy

    Keywords

    • Bifunctional electrocatalyst
    • Heteroatom doping
    • Zeolitic imidazolate framework
    • Zn–air battery

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