Hybrid architecture design enhances the areal capacity and cycling life of low-overpotential nanoarray oxygen electrode for lithium–oxygen batteries

作     者：Liang Xiao Duo Wang Ming Li Bohua Deng Jinping Liu Liang Xiao;Duo Wang;Ming Li;Bohua Deng;Jinping Liu

作者机构：School of ChemistryChemical Engineering and Life ScienceWuhan University of TechnologyWuhan 430070HubeiChina State Key Laboratory of Advanced Technology for Materials Synthesis and ProcessingWuhan University of TechnologyWuhan 430070HubeiChina 

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

年 卷 期：2020年第29卷第7期

页      面：248-255,I0008页

核心收录：

学科分类：0808[工学-电气工程] 08[工学] 

基　　金：supported by grants from the National Natural Science Foundation of China(Nos.21673169,51672205,51972257) the National Key Research Program of China(No.2016YFA0202602) the Research Start-Up Fund from Wuhan University of Technology the Fundamental Research Funds for the Central Universities(WUT:No.2019IB003) 

主　　题：Hybrid architecture Nanoarray oxygen electrode Synergistic effect Three-dimensional current collector Lithium-oxygen batteries 

摘      要：Transition metal oxide(TMO)nanoarrays are promising architecture designs for self-supporting oxygen electrodes to achieve high catalytic activities in lithium-oxygen(Li-O2)***,the poor conductive nature of TMOs and the confined growth of nanostructures on the limited surfaces of electrode substrates result in the low areal capacities of TMO nanoarray electrodes,which seriously deteriorates the intrinsically high energy densities of Li-O2 ***,we propose a hybrid nanoarray architecture design that integrates the high electronic conductivity of carbon nanoflakes(CNFs)and the high catalytic activity of Co3 O4 nanosheets on carbon cloth(CC).Due to the synergistic effect of two differently featured components,the hybrid nanoarrays(Co3 O4-CNF@CC)achieve a high reversible capacity of3.14 mA h cm-2 that cannot be achieved by only single ***,CNFs grown on CC induce the three-dimensionally distributed growth of ultrafine Co3 O4 nanosheets to enable the efficient utilization of ***,with the high catalytic efficiency,hybrid Co3 O4-CNF@CC also achieves a more prolonged cycling life than pristine TMO *** present work provides a new strategy for improving the performance of nanoarray oxygen electrodes via the hybrid architecture design that integrates the intrinsic properties of each component and induces the three-dimensional distribution of catalysts.