Multilayer Co3O4@C@MnO2 Nanowire Heterostructures For High-Performance Asymmetry Supercapacitor with Long Cycle Life
作者单位：Center for Advanced Materials Research Zhongyuan University of Technology College of Chemistry and Molecular Engineering Zhengzhou University
会议名称：《2018年中西部地区无机化学化工学术研讨会》
会议日期：2018年
学科分类：080801[工学-电机与电器] 0808[工学-电气工程] 07[理学] 08[工学] 070205[理学-凝聚态物理] 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]
关 键 词：Heterostructures Asymmetry Supercapacitor Long Cycle Life
摘 要：Heterostructures show excellent performance in energy and environment fields due to the unique interface structure and the advantages of ***,we introduce a facile and stepwise method to prepare multi-element CoO@C@MnO heterostructures on nickel foam as binder-free supercapacitor electrode materials,which crystalline CoO acting as intimalcoreand wrinkled ultrathin MnO nanosheets as the outershell.In three-electrode mode,CoO@C@MnO shows excellent electrochemical performances with a high specific capacitance of 1335.3 F g at 20 A g as well as long-term cycling ***,the asymmetry supercapacitor assembled with CoO@C@MnO heterostructures and active carbon shows excellent rate performance and long life (70 F g at 20 A g after 10000 cycles,even 61 F g at 20 A g after 30000 cycles).Compared with CoO@MnO or C@MnO,the improved performance of CoO@C@MnO heterostructures is proposed to be attributed to the synergistic effect in ***,the introduction of C between CoO and MnO could promote the electron transfer,reduce the impedance and thus improve the electrochemical performance of the heterostructures..