Issue 9, 2024

Chemical fabrication and synergistic mechanism of N-doped carbon modified with FeP as catalysts for flexible rechargeable Zn–air batteries

Abstract

Low-cost and efficient electrocatalysts for the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) are vital for the applications of flexible rechargeable zinc–air batteries (ZABs). Herein, three-dimensional (3D) porous N-doped Paulownia-derived carbon modified with FeP nanoparticles (FeP@NPW) was used as a bifunctional catalyst for flexible rechargeable ZABs. The FeP@NPW electrocatalyst exhibits a first-class bifunctional activity for the ORR and OER. The descriptor ΔE between the half-wave potential of the ORR and the potential of the OER at 10 mA cm−2 was 0.65 V. The flexible rechargeable ZABs have a high open circuit voltage of 1.43 V and superior cycle stability (over 70 h). Coupling 3D hierarchical pores of NPW and FeP facilitates charge exchange, mass transfer, and electron transportation. A high concentration of FeP sites was available during the reaction because of the large specific surface area (798 m2 g−1) of FeP@NPW. The synergistic effects between N-doped biomass-derived carbon and FeP nanoparticles improve the catalytic activity towards the ORR and OER. This work paves the way for the conversion of abundant biomass into high-value engineering products and the application of transition metals in the energy conversion and storage field.

Graphical abstract: Chemical fabrication and synergistic mechanism of N-doped carbon modified with FeP as catalysts for flexible rechargeable Zn–air batteries

Supplementary files

Article information

Article type
Paper
Submitted
06 Feb 2024
Accepted
20 Mar 2024
First published
21 Mar 2024

Sustainable Energy Fuels, 2024,8, 1983-1991

Chemical fabrication and synergistic mechanism of N-doped carbon modified with FeP as catalysts for flexible rechargeable Zn–air batteries

X. Wu, T. Zhou, G. Han, S. Liu, M. Cao, S. Li, J. Wang, Y. Liu, J. Jiang, Y. Wang and B. Li, Sustainable Energy Fuels, 2024, 8, 1983 DOI: 10.1039/D4SE00197D

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