In situexsolved Co nanoparticles coupled on LiCoO2nanofibers to induce oxygen electrocatalysis for rechargeable Zn-air batteries

Article abstract of DOI:10.1039/d0ta07362h

Layered lithium cobalt oxide, LiCoO₂(LCO), is a promising catalyst for oxygen evolution reaction (OER) and oxygen reduction reaction (ORR); however, its bifunctional activity is still far from desirable. Here, a novel heterointerface of Co?LCO nanofibers (Co?LCO-NFs) is developedviaan elegantin situexsolution approach to promote bifunctionality. Thisin situexsolution promises improved electrical conductivity, rich oxygen vacancies, and in particular a modulated electronic structure, thereby demonstrating a substantially enhanced bifunctional activity. Density functional theory calculations further reveal that the synergistic coupling of LCO and Co results in strengthened covalency of Co-O and facilitated OER/ORR kinetics. As a result, an assembled Zn-air battery using the Co?LCO-NFs electrode delivers high peak power density with competitive cycling stability, favorably outperforming the benchmark Pt/C-IrO₂based batteries. This protocol provides new insights into designing heterostructured bifunctional catalysts for related energy conversion and storage devices.

Full text of DOI:10.1039/d0ta07362h

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Journal of
Materials Chemistry A
Materials for energy and sustainability
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Zhang, B. He, Q. Wang and L. Zhao, J. Mater. Chem. A, 2020, DOI: 10.1039/D0TA07362H.
Volume
Number 12
28 March 2018
Pages 4883-5230
6
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accepted for publication.
Journal of
Materials Chemistry A
Materials for energy and sustainability
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ISSN 2050-7488
COMMUNICATION
Zhenhai Wen et al.
An electrochemically neutralized energy-assisted low-cost
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DOI: 10.1039/D0TA07362H