Luffa-like Interconnective Porous Nanofiber with Anchored Co/CoCr2O4 Hybrid Nanoparticles for Zinc–Air Batteries

Jin, Guoqiang; Liu, Bin; Liu, Yan; Zhang, Xueting; Cao, Dapeng; Zhang, Xiuling

doi:10.3390/batteries11080306

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Luffa-like Interconnective Porous Nanofiber with Anchored Co/CoCr₂O₄ Hybrid Nanoparticles for Zinc–Air Batteries

by

Guoqiang Jin

^1,†,

Bin Liu

^2,*,

Yan Liu

^1,†,

Xueting Zhang

¹,

Dapeng Cao

^1,* and

Xiuling Zhang

^1,*

¹

State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China

²

Beijing Mechanical Equipment Institute, Beijing 100039, China

^*

Authors to whom correspondence should be addressed.

^†

These authors contributed equally to this work.

Batteries 2025, 11(8), 306; https://doi.org/10.3390/batteries11080306

Submission received: 25 June 2025 / Revised: 25 July 2025 / Accepted: 7 August 2025 / Published: 8 August 2025

(This article belongs to the Special Issue Novel Materials for Rechargeable Batteries)

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Abstract

The development of robust oxygen reduction reaction (ORR) catalyst with fast kinetics and good durability is significant for rechargeable zinc–air batteries (ZABs) but still remains a great challenge. Herein, inspired by the chain-like interconnective porous structure of plant luffa, an ORR catalyst of Co/CoCr₂O₄@ IPCF is fabricated, with Co and CoCr₂O₄ hybrid nanoparticles (NPs) embedding into interconnective porous carbon nanofibers (IPCF). Contributing to CoCr₂O₄ NPs stabilized Co active sites, the resulting ZABs assembled with Co/CoCr₂O₄@IPCF as an air cathode catalyst delivering sustainable cycling stability of 550 h, surpassing that of Co@IPCF based on ZABs (215 h). Also, the Co/CoCr₂O₄@IPCF has a high ORR performance with a half-wave potential (E_1/2) of 0.866 V in alkaline medium. The cycling stability originates from the IPCF carrier and the synergistic effect of Co NPs and CoCr₂O₄ NPs. The chain-like interconnective porous structure of the fibers provides more active sites and facilitates mass transfer to avoid the accumulation of OH^- and the exposure of H₂O₂, while the CoCr₂O₄ NPs can serve as a regulator for stabilizing the Co NPs electrochemical performance.

Keywords: interconnective porous nanofiber; nanoparticle encapsulation; oxygen reduction catalyst; durability; zinc–air battery

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MDPI and ACS Style

Jin, G.; Liu, B.; Liu, Y.; Zhang, X.; Cao, D.; Zhang, X. Luffa-like Interconnective Porous Nanofiber with Anchored Co/CoCr₂O₄ Hybrid Nanoparticles for Zinc–Air Batteries. Batteries 2025, 11, 306. https://doi.org/10.3390/batteries11080306

AMA Style

Jin G, Liu B, Liu Y, Zhang X, Cao D, Zhang X. Luffa-like Interconnective Porous Nanofiber with Anchored Co/CoCr₂O₄ Hybrid Nanoparticles for Zinc–Air Batteries. Batteries. 2025; 11(8):306. https://doi.org/10.3390/batteries11080306

Chicago/Turabian Style

Jin, Guoqiang, Bin Liu, Yan Liu, Xueting Zhang, Dapeng Cao, and Xiuling Zhang. 2025. "Luffa-like Interconnective Porous Nanofiber with Anchored Co/CoCr₂O₄ Hybrid Nanoparticles for Zinc–Air Batteries" Batteries 11, no. 8: 306. https://doi.org/10.3390/batteries11080306

APA Style

Jin, G., Liu, B., Liu, Y., Zhang, X., Cao, D., & Zhang, X. (2025). Luffa-like Interconnective Porous Nanofiber with Anchored Co/CoCr₂O₄ Hybrid Nanoparticles for Zinc–Air Batteries. Batteries, 11(8), 306. https://doi.org/10.3390/batteries11080306

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Luffa-like Interconnective Porous Nanofiber with Anchored Co/CoCr₂O₄ Hybrid Nanoparticles for Zinc–Air Batteries

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