Spinel CoMn2O4 nanosheet arrays grown on nickel foam for high-performance supercapacitor electrode

• Published in: Applied surface science Vol. 357; pp. 2013 - 2021
• Main Authors: Yunyun, Fu, Xu, Lu, Wankun, Zhao, Yuxuan, Zhang, Yunhan, Yang, Honglin, Quan, Xuetang, Xu, Fan, Wang
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.12.2015
• Subjects: Arrays; Capacitance; Capacitors; CoMn2O4 nanosheets; Electrodes; Energy storage and conversion; Foams; Nanostructure; Nickel; Porous materials; Supercapacitor; Supercapacitors; Supercapacitor; Porous materials; Energy storage and conversion; CoMn2O4 nanosheets
• ISSN: 0169-4332; 1873-5584
• DOI: 10.1016/j.apsusc.2015.09.176

•Co–Mn carbonate nanosheets on Ni foam were prepared via a facile hydrothermal route.•Ultrathin porous CoMn2O4 nanosheets obtained after post-annealing treatment.•Binder-free CoMn2O4/Ni foam electrode shows enhanced electrochemical performance. Ultrathin CoMn2O4 nanosheets grown on nickel foam have been prepared via a facile hydrothermal route with post-annealing treatments, and further investigated as a binder-free electrode for supercapacitors. Benefiting from the directing growth in current collector, porous structure and enough spaces between the neighbors nanosheets, CoMn2O4 electrode show enhanced capacitance performance with a specific capacitance of 1529 and 670Fg−1 at current densities of 2 and 50Ag−1, respectively, with a good cycling ability (100% of the initial specific capacitance remains after 3000 cycles). These results show that CoMn2O4 nanosheets with the nickel foam substrate obtained from this cost-effective synthesis route would have great potential applications in supercapacitors.