High Energy Efficiency on Zn–Air/Iodide Hybrid Batteries with Iron Phthalocyanine Coupled Co Single Atoms Dual Active Sites

作者：Xue Liu, Jie Song, Hao Song, Hongyan Zhuo, Zhuang Shi, Wenmiao Chen, Yuexing Zhang, Yanli Chen · 发表于：Advanced Functional Materials · 年份：2025 · DOI：10.1002/adfm.202507049 · 被引用次数：5 · 研究领域：Advanced battery technologies research、Electrocatalysts for Energy Conversion、Conducting polymers and applications

Abstract Rechargeable zinc–air batteries (ZABs) are hindered by substantial voltage hysteresis and limited cycling stability. To address these challenges, a dual‐innovation strategy is developed through synergistic electrolyte engineering and catalyst design. First, electrolyte engineering is implemented through the incorporation of KI into the electrolyte, transforming conventional ZABs into zinc–air/iodide hybrid batteries (ZAIHBs). This modification replaces the oxygen evolution reaction (OER) with the iodine oxidation reaction (IOR), which operates at a significantly reduced overpotential. Second, FePc@CoSAs/NC catalyst is constructed by anchoring iron phthalocyanine (FePc) on Co single‐atom/N‐doped carbon substrates. FePc@CoSAs/NC exhibiting a half‐wave potential of 0.89 V for ORR and achieving 1.26 V at 10 mA cm −2 for IOR with a record‐low ORR/IOR voltage gap of 0.37 V. The optimized ZAIHBs demonstrate exceptional energy efficiency of 75% and cycling stability (73.5% retention over 350 h), surpassing conventional ZABs. Density functional theory calculations reveal that the Co–Fe dual‐site coordination optimizes adsorption energetics for critical reaction intermediates (OH* in ORR and I* in IOR), elucidating the enhanced reaction kinetics. This work establishes a co‐design paradigm for high‐performance hybrid energy systems through integrated electrolyte and catalyst engineering.