Free-standing nitrogen doped graphene/Co(OH)_(2) composite films with superior catalytic activity for aprotic lithium-oxygen batteries  

作　　者：Zifang Zhao Yue Liu Fang Wan Shuai Wang Nannan Zhang Lili Liu Anyuan Cao Zhiqiang Niu 

机构地区：[1]Tianjin Key Laboratory for Photoelectric Materials and Devices,School of Materials Science and Engineering,Tianjin University of Technology.Tianjin 300384,China [2]Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education),Renewable Energy Conversion and Storage Center,College of Chemistry,Nankai University,Tianjin 300071,China [3]Department of Materials Science and Engineering,College of Engineering,Peking University,Beijing 100871,China

出　　处：《Chinese Chemical Letters》2021年第2期594-597,共4页中国化学快报（英文版）

基　　金：supported by Ministry of Science and Technology of China (No.2017YFA0206701);National Natural Science Foundation of China (Nos.51822205 and 21875121);China Postdoctoral Science Foundation (No.2019M650045)。

摘　　要：The recent boom in large-scale energy storage system promotes the development of lithium-oxygen batteries because of their high theo retical energy density.However,their applications are still limited by the sluggish kinetic,insoluble discharge product deposition and the undesired parasitic reaction.Herein,the free-standing nitrogen doped reduced graphene oxide/Co(OH)_(2)(NRGO/Co(OH)_(2)) composite films were prepared by a facile hydrothermal method,The NRGO/Co(OH)_(2) composite films display interconnected three-dimensional conductive network,which can not only promote the diffusion of O2 and the transport of electrolyte ions,but also provide abundant storage space for discharge products.Moreover,the introduction of nitrogen-containing functional groups results in improved conductivity and electron adsorption ability,which can facilitate electron transport and enhance the surface catalytic activity.Combining with excellent catalytic performance,the lithium-oxygen batteries with NRGO/Co(OH)_(2) composite film cathodes deliver low charge overpotential and excellent cycling performance.

关 键 词：Free-standing films Nitrogen doping GRAPHENE Co(OH)_(2) Lithium-oxygen batteries 

分 类 号：TM912[电气工程—电力电子与电力传动] O643.36[理学—物理化学]