title: A high-performance supercapacitor electrode based on tremella-like NiC2O4@NiO core/shell hierarchical nanostructures on nickel foam.
abstract: Tremella-like nickel oxalate@nickel oxide (NiC2O4@NiO) core/shell hierarchical nanostructures have been successfully synthesized on nickel foam, using Ni foam as a current collector, a Ni source and a three-dimensional (3D) substrate, through a facile hydrothermal method followed by an electrochemical activation process. The prepared samples can be directly used as binder-free electrodes for supercapacitors. The tremella-like morphology, together with the NiC2O4nanoblocks on 3D Ni foam, significantly increases the amount of active sites for redox reactions and the conductivity of the electrode material, shortens the diffusion pathway for ions, facilitates the effective penetration of the electrolyte, and lowers the intrinsic equivalent series resistance, demonstrating good potential for energy storage application. This material has a high specific capacitance of 2287.09 F g-1at 1 A g-1, a good cycling stability (remaining 95% after 10 000 cycles) and a good rate capability (83.2% retention upon increasing the current density by 10 times).
authors.affiliation: State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun, Jilin 130012, PR China. suohui@jlu.edu.cn.
authors.forename: Dong
authors.initials: D
authors.lastname: He
authors.affiliation: State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun, Jilin 130012, PR China. suohui@jlu.edu.cn.
authors.forename: Guolong
authors.initials: G
authors.lastname: Liu
authors.affiliation: State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun, Jilin 130012, PR China. suohui@jlu.edu.cn.
authors.forename: Anqi
authors.initials: A
authors.lastname: Pang
authors.affiliation: Production Center of China Mobile Communications Corporation, Changchun, Jilin 130103, PR China.
authors.forename: Yang
authors.initials: Y
authors.lastname: Jiang
authors.affiliation: State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun, Jilin 130012, PR China. suohui@jlu.edu.cn.
authors.forename: Hui
authors.identifier: http://orcid.org/0000-0003-3004-5405
authors.initials: H
authors.lastname: Suo
authors.affiliation: State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun, Jilin 130012, PR China. suohui@jlu.edu.cn.
authors.forename: Chun
authors.initials: C
authors.lastname: Zhao