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云师大化工学院李如春和暨南大学袁定胜合作在Chemical Engineering Journal上发表最最新成果

已有 540 次阅读 2025-12-2 11:29 |个人分类:云师大研究|系统分类:论文交流

2025年11月26日，国际知名期刊《Chemical Engineering Journal》在线发表了云南师范大学化学化工学院李如春与暨南大学袁定胜教授合作取得的最新研究成果《

Electronic regulation induced by NiFe/NiFe2O4 heterostructure encapsulated in N-doped carbon for rechargeable aqueous and quasi-solid Zn–air batteries》（中国科学院一区TOP，影响因子IF=13.4）论文链接：https://www.sciencedirect.com/science/article/pii/S1385894725121426，云南师范大学化学化工学院李如春与暨南大学袁定胜教授共同通讯作者。

Abstract

Transition metal@carbon composites have been considered efficient bifunctional electrocatalysts for oxygen reduction reaction (ORR) and oxygen evolution reaction (OER). However, their catalytic activity is restricted by low catalytically active sites owing to severe aggregation effects during pyrolysis. Herein, a confined pyrolysis strategy was proposed to controllably prepare a NiFe alloy/spinel-type NiFe2O4 heterostructure embedded in N-doped carbon (NiFe/NiFe2O4–NC) as a bifunctional ORR/OER electrocatalyst. The synthesized hierarchical NiFe/NiFe2O4–NC catalyst exhibits a high specific surface area, excellent mass transfer kinetics, and an abundance of active sites. A combination of in situ/ex situ experiments and theoretical simulations reveals that the unique alloy/spinel heterostructure facilitates electron transfer, thereby optimizing the adsorption energies of reaction intermediates. This leads to exceptional bifunctional activity for both the ORR and OER. Aqueous rechargeable zinc–air batteries (ZABs) constructed using NiFe/NiFe2O4–NC as ORR/OER catalysts achieve a superior peak power density of 179.7 mW cm−2 and ultrahigh durability of 1400 h. Furthermore, to meet the demands of wearable electronic devices, quasi-solid-state zinc–air batteries (QZABs) were assembled using a polyacrylamide gel polymer electrolyte comprising an ionic liquid–SiO2–cellulose nanofiber composite. The fabricated QZABs demonstrated an impressive open-circuit voltage of 1.45 V and maintained prominent cyclic performance for 60 h. This study proposes a facile pyrolysis strategy to develop high-performance transition metal heterostructure@carbon composites with ultrahigh durability for rechargeable aqueous/QZABs.