Sub-5 nm ZnCoS shells on Co cores via chemical vapor reconstruction: ultra-thin heterointerfaces enabling efficient oxygen electrocatalysis in zinc–air batteries

Xiangjun Zheng; Wenhua Shi; Yaman Cui; Jiayu Zhao; Qianqian Fan; Zhongyao Duan; Yuanjun Liu; Xingmei Guo; Junhao Zhang; Ruizhi Yang

doi:10.1039/D6CC01336H

Sub-5 nm ZnCoS shells on Co cores via chemical vapor reconstruction: ultra-thin heterointerfaces enabling efficient oxygen electrocatalysis in zinc–air batteries

Xiangjun Zheng,†^a Wenhua Shi,†^a Yaman Cui,^a Jiayu Zhao,^a Qianqian Fan,^a Zhongyao Duan,^a Yuanjun Liu,^a Xingmei Guo,

^a Junhao Zhang

*^a and Ruizhi Yang

*^b

Author affiliations

* Corresponding authors

^a School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu 212003, China
E-mail: jhzhang6@just.edu.cn

^b College of Energy, Soochow Institute for Energy and Materials Innovations, Soochow University, Suzhou 215006, P. R. China
E-mail: yangrz@suda.edu.cn

Abstract

Sub-5 nm ZnCoS shells on Co cores in N/S-co-doped carbon (Co@ZCS/NSC) are engineered via chemical vapor reconstruction of ZnS. Ultrathin-shelled heterostructures induce quantum confinement effects, amplifying Schottky junction-driven charge transfer and electron accumulation. Synergy with high-valent Co species enhances oxygen electrocatalysis, delivering 0.83 V for the ORR and 390 mV for the OER at 10 mA cm⁻². Zinc–air batteries exhibit 796 mA h g⁻¹ capacity and 450 h stability.

Chemical Communications

Sub-5 nm ZnCoS shells on Co cores via chemical vapor reconstruction: ultra-thin heterointerfaces enabling efficient oxygen electrocatalysis in zinc–air batteries

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Sub-5 nm ZnCoS shells on Co cores via chemical vapor reconstruction: ultra-thin heterointerfaces enabling efficient oxygen electrocatalysis in zinc–air batteries

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