Precisely Constructing Orbital-Coupled Fe─Co Dual-atom Sites for High-Energy-Efficiency Zn-Air/Iodide Hybrid Batteries.
Jingyuan QiaoYurong YouLingqiao KongWeihang FengHeshuang ZhangHaibin HuangCaifang LiWei HeZhengMing SunPublished in: Advanced materials (Deerfield Beach, Fla.) (2024)
Rechargeable Zn-air batteries (ZABs) are promising for energy storage and conversion. However, the high charging voltage and low energy efficiency hinder their commercialization. Herein, these challenges are addressed by employing precisely constructed multifunctional Fe-Co diatomic site catalysts (FeCo-DACs) and integrating iodide/iodate redox into ZABs to create Zinc-air/iodide hybrid batteries (ZAIHBs) with highly efficient multifunctional catalyst. The strong coupling between the 3d orbitals of Fe and Co weakens the excessively strong binding strength between active sites and intermediates, enhancing the catalytic activities for oxygen reduction/evolution reaction and iodide/iodate redox. Consequently, FeCo-DACs exhibit outstanding bifunctional oxygen catalytic activity with a small potential gap (ΔE = 0.66 V) and outstanding stability. Moreover, an outstanding catalytic performance toward iodide/iodate redox is obtained. Therefore, FeCo-DAC-based ZAIHBs exhibit high energy efficiency of up to 75% at 10 mA cm -2 and excellent cycling stability (72% after 500 h). This research offers critical insights into the rational design of DACs and paves the way for high-energy efficiency energy storage devices.
Keyphrases
- highly efficient
- metal organic framework
- electron transfer
- drug delivery
- solid state
- heavy metals
- cancer therapy
- room temperature
- wastewater treatment
- molecular dynamics
- gold nanoparticles
- density functional theory
- visible light
- transcription factor
- aqueous solution
- risk assessment
- binding protein
- ionic liquid
- climate change
- crystal structure
- reduced graphene oxide
- transition metal