Issue 24, 2023

Boosting oxygen reduction of well-dispersed CoP/V(PO3)3 sites via geometric and electronic engineering for flexible Zn–air batteries

Abstract

Possessing electron-rich phosphorus and metal sites, transition metal phosphides are expected to break through the reaction kinetics barrier of the oxygen reduction reaction (ORR) for Zn–air batteries (ZABs). Herein, well-dispersed CoP/V(PO3)3 heterojunction nanoparticles were decorated on hollow carbon spheres (CoP/V(PO3)3@HCS) via bi-surfactant template tactics. Experimental and theoretical investigations synergistically confirmed that multi-component coupling induced a charge redistribution and a moderate d-band center, which optimized the adsorption of intermediates and activation energy barrier. Because of the above features, the resultant CoP/V(PO3)3@HCS exhibits eminent ORR activity (E1/2 = 0.81 V, jL = 5.6 mA cm−2) and stability (10 h, ∼98%), surpassing those of most previous reports. Impressively, a CoP/V(PO3)3@HCS-based aqueous ZAB achieves a high power density (182 mW cm−2) and an extremely long life (710 h), being 1.4 and 1.6 times those of the commercial Pt/C, respectively, and its assembled flexible counterpart features extraordinary bending stability.

Graphical abstract: Boosting oxygen reduction of well-dispersed CoP/V(PO3)3 sites via geometric and electronic engineering for flexible Zn–air batteries

Supplementary files

Article information

Article type
Research Article
Submitted
08 Sep 2023
Accepted
30 Oct 2023
First published
30 Oct 2023

Inorg. Chem. Front., 2023,10, 7333-7342

Boosting oxygen reduction of well-dispersed CoP/V(PO3)3 sites via geometric and electronic engineering for flexible Zn–air batteries

Z. Luo, F. Wei, J. Gong, L. Wang, Z. Huang, T. T. Isimjan and X. Yang, Inorg. Chem. Front., 2023, 10, 7333 DOI: 10.1039/D3QI01815F

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