Core-shell-structured Co@Co4N nanoparticles encapsulated into MnO-modified porous N-doping carbon nanocubes as bifunctional catalysts for rechargeable Zn–air batteries

作     者：Fengmei Wang Huimin Zhao Yiru Ma Yu Yang Bin Li Yuanyuan Cui Ziyang Guo Lei Wang Fengmei Wang;Huimin Zhao;Yiru Ma;Yu Yang;Bin Li;Yuanyuan Cui;Ziyang Guo;Lei Wang

作者机构：Key Laboratory of Eco-Chemical EngineeringTaishan Scholar Advantage and Characteristic Discipline Team of Eco Chemical Process and TechnologyCollege of Chemistry and Molecular EngineeringQingdao University of Science and TechnologyQingdao 266042ShandongChina Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education)College of ChemistryNankai University.Tianjin 300071China Shimadzu China Co.LTD.Shanghai 200233China 

出 版 物：《Journal of Energy Chemistry》 (能源化学（英文版）)

年 卷 期：2020年第29卷第11期

页      面：52-62页

核心收录：

学科分类：081705[工学-工业催化] 07[理学] 070205[理学-凝聚态物理] 08[工学] 0817[工学-化学工程与技术] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：the National Natural Science Foundation of China(21905151 and 51772162) Outstanding Youth Foundation of Shandong Province,China(ZR2019JQ14) the Natural Science Foundation of Shandong Province(ZR2018BB034) Taishan Scholar Young Talent Program Major Scientific and Technological Innovation Project(2019JZZY020405) China Postdoctoral Science Foundation(2019M652499) the State Key Laboratory of Inorganic Synthesis and Preparative Chemistry of Jilin University(2019-23) 

主　　题：Co@Co4N nanoparticles N-doped carbon nanocubes MnO species Flexibility Zn–air battery 

摘      要：Designing the highly catalytic activity and durable bifunctional catalysts toward oxygen reduction/evolution reaction(ORR/OER) is paramount for metal–air batteries. Metal–organic frameworks(MOFs)-based materials have attracted a great deal of attention as the potential candidate for effectively catalyzing ORR/OER due to their adjustable composition and porous structure. Herein, we first introduce the Mn species into zeolitic-imidazole frameworks(ZIFs) and then further pyrolyze the Mn-containing bimetallic ZIFs to synthesize core-shell-structured Co@Co4N nanoparticles embedded into MnO-modified porous N-doped carbon nanocubes(Co@Co4N/MnO–NC). Co@Co4N/MnO–NC exhibits the outstanding catalytic activity toward ORR and OER which is attributed to its abundant pyridinic/graphitic N and Co4N,the optimized content of MnO species, highly dispersed catalytic sites and porous carbon matrix. As a result, the Co@Co4N/MnO–NC-based Zn–air battery exhibits enhanced performances, including the high discharge capacity(762 mA h gZn-1), large power density(200.5 mW cm-2), stable potential profile over 72 h, low overpotential(1.0 V) and superior cycling life(2800 cycles). Moreover, the belt-shaped Co@Co4N/MnO–NC cathode-based Zn–air batteries are also designed which exhibit the superb electrochemical properties at different bending/twisting conditions.