COF-derived Co nanoparticles@N-doped carbon electrocatalysts for high performance Zn-air batteries  

作　　者：Jie Wei Chengcai Zhao Ming Chen Fengying Liu Limin Zhao Hui Zhao Zhong-Yong Yuan 

机构地区：[1]School of Materials Science and Engineering,Liaocheng University,Liaocheng 252000,China [2]College of Chemistry and Chemical Engineering,Xinyang Normal University,Xinyang 464000,China [3]Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education),School of Materials Science and Engineering,Nankai University,Tianjin 300350,China

出　　处：《Chinese Journal of Chemical Engineering》2023年第11期43-50,共8页中国化学工程学报（英文版）

基　　金：supported by the Natural Science Foundation of Shandong Province(ZR2019PB013);the Training Program of Innovation and Entrepreneurship for Undergraduates of Liaocheng University(CXCY2022277)。

摘　　要：Precise modulation of the structure and composition of electrocatalysts is critical for promoting the kinetically sluggish process of oxygen reduction reaction(ORR)and oxygen evolution reaction(OER).Covalent organic frameworks(COF)offer a novel way to create highly efficient electrocatalysts due to their tunable composition,structure and surface area.Herein,we report a high-efficiency bifunctional electrocatalyst comprising Co nanoparticles embedded within N-doped carbons(Co@NCs)for Zn-air batteries(ZABs).The Co@NC is yielded via the coordination of a triazine COF with Co-containing precursors and subsequent calcination under inert atmosphere.The as-prepared Co@NC exhibits remarkable ORR/OER performance and great potential in rechargeable ZABs.The liquid ZAB constructed with Co@NC provides both high specific capacity and power density.Remarkably,the ZAB exhibits a voltage gap of 0.8 V during discharge and charge cycles and high stability for 220 h compared to the Pt/C-assembled battery.This strategy for regulating electrocatalytic activities of COF-derived carbon materials could be expanded for creating various carbon catalysts.

关 键 词：COF Co@NC Composites ELECTROCHEMISTRY CATALYSIS Zn-air battery 

分 类 号：TQ426[化学工程] TM911.41[电气工程—电力电子与电力传动]