Nickel-cobalt spinel-based oxygen evolution electrode for zinc-air flow battery

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22340%2F25%3A43931046" target="_blank" >RIV/60461373:22340/25:43931046 - isvavai.cz</a>

Alternative codes found

RIV/60461373:22310/25:43931046

Result on the web

<a href="https://www.sciencedirect.com/science/article/pii/S2352152X25005481" target="_blank" >https://www.sciencedirect.com/science/article/pii/S2352152X25005481</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.est.2025.115835" target="_blank" >10.1016/j.est.2025.115835</a>

Result language

angličtina

Original language name

Nickel-cobalt spinel-based oxygen evolution electrode for zinc-air flow battery

Original language description

Zinc-air flow battery (ZAFB) represents a candidate for safe, cheap and non-toxicstationary energy storage, however, uneven zinc deposition and low efficiency ofoxygen reactions on positive electrode still obstruct its commercialization. In ourcontribution, we address the latter challenge by performance enhancement ofelectrode for oxygen evolution reaction (OER) from highly alkaline electrolyte. This wasachieved by applying a NiCo2O4 electro-catalytic layer onto the selected 3D nickelbasedsubstrates via electrochemically-assisted deposition followed by calcination. Thedetailed physico-chemical characterization of the electrodes (specific surface area,conductivity, EDS, SEM+EDS, XRD) confirmed spinel structure of the preparedcatalyst and its homogeneous deposition over the substrate. The electrochemicalcharacterization of the electrodes was performed in three different set-ups using acomplex methodology incl. voltammetry techniques, electrochemical impedancespectroscopy, galvanostatic load and charge-discharge cycling in the developed 3-electrodes 3-compartments battery full-cell. For both Ni substrates the depositedNiCo2O4 catalytic layer effectively lowered the OER overpotential due to significantlyenlarged specific surface area. This effect was more pronounced for the foamsubstrate with more compact structure. The developed ZAFB with the optimized OERelectrode achieved stable and efficient performance at high current densities of 100mA cm–2 (which is the highest reported one for cycling experiments) in a broad SoCrange (0–80%) with energy efficiency of 42.1% and no decay of capacity utilization.

Czech name

—

Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

20400 - Chemical engineering

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2025

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Journal of Energy Storage

ISSN

2352-152X

e-ISSN

2352-1538

Volume of the periodical

115

Issue of the periodical within the volume

115835

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

13

Pages from-to

115835

UT code for WoS article

001436672500001

EID of the result in the Scopus database

2-s2.0-85218640868