Oxygen-deficient VOx integrated cobalt-nitrogen codoped carbon emerging as a sustainable bifunctional catalyst for efficient zinc-air batteries
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27640%2F25%3A10259395" target="_blank" >RIV/61989100:27640/25:10259395 - isvavai.cz</a>
Result on the web
<a href="https://www.sciencedirect.com/science/article/pii/S2214993725003100?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S2214993725003100?via%3Dihub</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.susmat.2025.e01542" target="_blank" >10.1016/j.susmat.2025.e01542</a>
Alternative languages
Result language
angličtina
Original language name
Oxygen-deficient VOx integrated cobalt-nitrogen codoped carbon emerging as a sustainable bifunctional catalyst for efficient zinc-air batteries
Original language description
Improving zinc-air batteries (ZABs) appeals for materials that hasten the two primary electrochemical reactions, especially OER and ORR. There has been significant efforts to construct non-precious metal dual functional catalysts as noble-metal catalyst alternatives. However, for these catalysts, reaching the performance levels required for ZAB commercialisation still remains an elusive goal. In this work, an interconnected oxygendeficient vanadium oxide (VOx) in proximity to (Co/Fe)-N-C sites evolving as a sustainable and efficient catalyst for ZABs has been presented. Among the synthesized materials, Co-N-C/VOx@NC demonstrates superior bifunctional ORR/OER activity at ZAB air-electrode evidenced by its lower voltage gap between ORR and OER compared to Fe-N-C/VOx@NC. According to theoretical simulations, the spectacular bifunctional performance of Co-N-C/VOx@NC was attributed to escalated charge-transfer across the active sites and favourable d-band centre alignment which improves the adsorption energy of oxygenated intermediates facilitating the reaction kinetics. Under practical ZABs operating conditions, Co-N-C/VOx@NC air electrode achieved a peak power density of 155 mW cm-2, outperforming other catalysts and furthermore yielding a specific capacity of 869.2 mAh g-1, exceeding that of PtRu/C by 1.8 % and Fe-N-C/VOx@NC by 22.5 % under similar operating conditions. Co-N-C/ VOx@NC batteries performed well after 35 h of uninterrupted operation at 5 mA cm-2, unlike PtRu/C batteries, which degraded after 600 cycles.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20500 - Materials engineering
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Sustainable Materials and Technologies
ISSN
2214-9929
e-ISSN
2214-9937
Volume of the periodical
45
Issue of the periodical within the volume
October
Country of publishing house
GB - UNITED KINGDOM
Number of pages
12
Pages from-to
"nestrankovano"
UT code for WoS article
001540830400007
EID of the result in the Scopus database
2-s2.0-105011056430