Preparation of porous cadmium sulphide on nickel foam: a novel electrode material with excellent supercapacitor performance. Issue 13 (14th March 2016)

• Record Type: Journal Article
• Authors: Xu, Panpan; Liu, Jijun; Yan, Peng; Miao, Chenxu; Ye, Ke; Cheng, Kui; Yin, Jinling; Cao, Dianxue; Li, Kaifeng; Wang, Guiling
• Is Part Of: Journal of materials chemistry. Volume 4:Issue 13(2016)
• Page Start: 4920
• Page End: 4928
• Publication Date: 2016-03-14
• Subjects: Materials -- Research -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental sciences -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c5ta09740a
• Languages: English
• ISSNs: 2050-7488

Abstract

Abstract : Large surface area, high electrical conductivity, and abundant channels have been recognized to favor faradic capacitors, but their realization at the same time by a facile preparation process is still a great challenge. Abstract : Large surface area, high electrical conductivity, and abundant channels have been recognized to favor faradic capacitors, but their realization at the same time by a facile preparation process is still a great challenge. Here, we synthesized porous cadmium sulphide freely standing on nickel foam (CdS/NF) via a one-step hydrothermal method which possesses high specific capacitance, good rate capability and outstanding cycling stability. The CdS/NF microspheres present pores with a mean size of ∼3 nm, resulting in fast diffusion of ions, facile transportation of electrons and high activity, which make great synergistic contributions to reversible redox reactions. In the resulting supercapacitors, a specific capacitance of 909 F g −1 is achieved at a current density of 2 mA cm −2 with excellent rate capability that 88% of the original capacitance is retained at 50 mA cm −2 . After 5000 charge–discharge cycles at current densities as large as 50 mA cm −2, 104% of initial capacitance is maintained. Finally, asymmetric supercapacitors with a high energy density of 28 W h kg −1 at a power density of 160 W kg −1 were obtained.