Dual‐Confinement Strategy Improves the Stability of High‐Entropy Alloys in Ultra‐Large Current Zinc‐Air Batteries
Xiaoxiao Zou, Songsong Zhi, Bohuai Pang, Xinyu Zhao, Hang Ma, Genfu Zhao, Hong Guo
Abstract
This study developed a symbiotic dual‐confinement strategy integrating interstitial oxygen doping and carbon coating to enhance high‐entropy alloys for high‐current‐density zinc‐air batteries. Through the combination of theoretical cluster models with the experimental synthesis of MnFeCoNiCu@C high‐entropy alloys, the synergistic suppression of demetalization and kinetic optimization was investigated. The dual‐confined high‐entropy alloys exhibited no significant attenuation for 1600 h in zinc‐air batteries and resisted large current of 100 mA cm −2 impacts, with density functional theory calculations confirming lower d‐band centers and higher formation energies, correlating with enhanced durability and reaction kinetics. This approach simultaneously addresses atomic‐scale metal dissolution and nanoscale mass transfer limitations, surpassing conventional coating strategies. The findings establish a framework for designing robust high‐entropy alloys, advancing their application in high‐demand electrocatalysis and energy conversion technologies.