Research Information System
JOURNAL OF MATERIALS SCIENCE, vol.61, no.5, pp.3171-3189, 2026 (SCI-Expanded, Scopus)
Porosity is a key factor in enhancing the electrochemical performance and durability of high entropy oxide (HEO) electrocatalysts for zinc-air batteries (ZABs) which are widely regarded as promising candidates for sustainable energy storage due to their high energy density, affordability, and environmental friendliness. The presence of an interconnected porous network within the HEO structure significantly improves oxygen diffusion, electrolyte penetration, and mass transport, while also imparting mechanical stability that assists mitigate electrode degradation during extended cycling. Although HEOs offer advantages such as tunable electronic structures and high catalytic activity, their long-term stability in harsh alkaline environments remains a challenge. By incorporating porosity, these stability concerns can be effectively addressed, enabling improved resilience and performance. In this study, we demonstrate a facile glycine-assisted sol-gel synthesis of a porous high-entropy spinel oxide, (FeCrCoMnZn)3O4-delta, which combines the catalytic benefits of HEOs with a tailored porous architecture to obtain a highly efficient and long-lasting air-cathode for ZABs. The resulting electrocatalyst exhibits remarkable durability used as an air cathode in ZAB, maintaining a stable voltage gap of over 1000 h of continuous charge-discharge cycles.