title: Vertically porous nickel thin film supported Mn3O4 for enhanced energy storage performance.
abstract: Three-dimensionally porous metal materials are often used as the current collectors and support for the active materials of supercapacitors. However, the applications of vertically porous metal materials in supercapacitors are rarely reported, and the effect of vertically porous metal materials on the energy storage performance of supported metal oxides is not explored. To this end, the Mn3O4-vertically porous nickel (VPN) electrodes are fabricated via a template-free method. The Mn3O4-VPN electrode shows much higher volumetric specific capacitances than that of flat nickel film supported Mn3O4 with the same loading under the same measurement conditions. The volumetric specific capacitance of the vertically porous nickel supported Mn3O4 electrode can reach 533Fcm(-3) at the scan rate of 2mVs(-1). The fabricated flexible all-solid microsupercapacitor based on the interdigital Mn3O4-VPN electrode has a volumetric specific capacitance of 110Fcm(-3) at the current density of 20μAcm(-2). The capacitance retention rate of this microsupercapacitor reaches 95% after 5000 cycles under the current density of 20μAcm(-2). The vertical pores in the nickel electrode not only fit the micro/nanofabrication process of the Mn3O4-VPN electrode, but also play an important role in enhancing the capacitive performances of supported Mn3O4 particles.
authors.affiliation: School of Materials Science & Engineering, Beijing Institute of Technology, Beijing 100081, China; CAS Center for Excellence in Nanoscience, Key Laboratory of Nanosystem and Hierarchical Fabrication, National Center for Nanoscience and Technology (NCNST), Beijing 100190, China.
authors.forename: Xiao-Jun
authors.initials: XJ
authors.lastname: Li
authors.affiliation: CAS Center for Excellence in Nanoscience, Key Laboratory of Nanosystem and Hierarchical Fabrication, National Center for Nanoscience and Technology (NCNST), Beijing 100190, China.
authors.forename: Zhi-Wei
authors.initials: ZW
authors.lastname: Song
authors.affiliation: ARC Centre of Excellence for Electromaterials Science, Intelligent Polymer Research Institute, Innovation Campus, University of Wollongong, NSW 2522, Australia.
authors.forename: Yong
authors.initials: Y
authors.lastname: Zhao
authors.affiliation: CAS Center for Excellence in Nanoscience, Key Laboratory of Nanosystem and Hierarchical Fabrication, National Center for Nanoscience and Technology (NCNST), Beijing 100190, China.
authors.forename: Yue
authors.initials: Y
authors.lastname: Wang
authors.affiliation: School of Materials Science & Engineering, Beijing Institute of Technology, Beijing 100081, China. Electronic address: zhaoxiuchen@bit.edu.cn.
authors.forename: Xiu-Chen
authors.initials: XC
authors.lastname: Zhao
authors.affiliation: CAS Center for Excellence in Nanoscience, Key Laboratory of Nanosystem and Hierarchical Fabrication, National Center for Nanoscience and Technology (NCNST), Beijing 100190, China. Electronic address: liangmh@nanoctr.cn.
authors.forename: Minghui
authors.initials: M
authors.lastname: Liang
authors.affiliation: CAS Center for Excellence in Nanoscience, Key Laboratory of Nanosystem and Hierarchical Fabrication, National Center for Nanoscience and Technology (NCNST), Beijing 100190, China. Electronic address: wgchu@nanoctr.cn.
authors.forename: Wei-Guo
authors.initials: WG
authors.lastname: Chu
authors.affiliation: CAS Center for Excellence in Nanoscience, Key Laboratory of Nanosystem and Hierarchical Fabrication, National Center for Nanoscience and Technology (NCNST), Beijing 100190, China. Electronic address: pjiang@nanoctr.cn.
authors.forename: Peng
authors.initials: P
authors.lastname: Jiang
authors.affiliation: School of Materials Science & Engineering, Beijing Institute of Technology, Beijing 100081, China.
authors.forename: Ying
authors.initials: Y
authors.lastname: Liu
keywords: Lithography; Micro/nanofabrication; Microsupercapacitor; Mn(3)O(4); Supercapacitor; Vertically porous electrode