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

Kód výsledku v 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>

Nalezeny alternativní kódy

RIV/60461373:22310/25:43931046

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20400 - Chemical engineering

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

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

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

Journal of Energy Storage

ISSN

2352-152X

e-ISSN

2352-1538

Svazek periodika

115

Číslo periodika v rámci svazku

115835

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

13

Strana od-do

115835

Kód UT WoS článku

001436672500001

EID výsledku v databázi Scopus

2-s2.0-85218640868