title: Hierarchical ternary Ni-Co-Se nanowires for high-performance supercapacitor device design.
abstract: Large-scale uniform Ni-Co-Se bimetallic ternary nanowires have been successfully synthesized through a successive cation exchange. First, NiSe nanowires in situ grown on nickel foam (NF) were prepared by a facile solvothermal route. Next, a series of ternary materials possessing different proportions of Ni and Co were fabricated by a Co-exchange method using the Ni@NiSe material as a template, which effectively achieved morphological inheritance from the parent material. To explore the electrochemical performance, all synthetic materials were assembled into asymmetric supercapacitor devices. Among asymmetric supercapacitor devices, the Ni@Ni0.8Co0.2Se//active carbon (AC) device exhibited a high specific capacitance of 86 F g-1at a current density of 1 A g-1and excellent cycling stability with virtually no decrease in capacitance after 2000 continuous charge-discharge cycles. This device still delivered an energy density of 17 Wh kg-1even at a high power density of 1526.8 W kg-1. These superior electrochemical properties of Ni@Ni0.8Co0.2Se as an electrode material for supercapacitor devices confirmed the synergistic effect between Co and Ni ions, suggesting their potential application in the field of energy storage.
authors.affiliation: Center for Advanced Materials Research, Zhongyuan University of Technology, Zhengzhou, Henan 450007, P. R. China. mlwzzu@163.com.
authors.forename: Kailu
authors.initials: K
authors.lastname: Guo
authors.affiliation: Center for Advanced Materials Research, Zhongyuan University of Technology, Zhengzhou, Henan 450007, P. R. China. mlwzzu@163.com.
authors.forename: Shizhong
authors.initials: S
authors.lastname: Cui
authors.affiliation: College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou, Henan 450001, P. R. China. chenweih@zzu.edu.cn.
authors.forename: Hongwei
authors.initials: H
authors.lastname: Hou
authors.affiliation: College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou, Henan 450001, P. R. China. chenweih@zzu.edu.cn.
authors.forename: Weihua
authors.initials: W
authors.lastname: Chen
authors.affiliation: Center for Advanced Materials Research, Zhongyuan University of Technology, Zhengzhou, Henan 450007, P. R. China. mlwzzu@163.com.
authors.forename: Liwei
authors.identifier: http://orcid.org/0000-0001-9239-6599
authors.initials: L
authors.lastname: Mi