Facile synthesis of hierarchical CoMoO4@NiMoO4 core–shell nanosheet arrays on nickel foam as an advanced electrode for asymmetric supercapacitors. Issue 47 (18th November 2016)

• Record Type: Journal Article
• Authors: Zhang, Ziqing; Zhang, Hongdan; Zhang, Xinyang; Yu, Deyang; Ji, Ying; Sun, Qiushi; Wang, Ying; Liu, Xiaoyang
• Is Part Of: Journal of materials chemistry. Volume 4:Issue 47(2016)
• Page Start: 18578
• Page End: 18584
• Publication Date: 2016-11-18
• Subjects: Materials -- Research -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental sciences -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c6ta06848k
• Languages: English
• ISSNs: 2050-7488

Abstract

Abstract : Hierarchical CoMoO4 @NiMoO4 core–shell nanosheet arrays synthesized via a two-step hydrothermal method with successive annealing exhibited outstanding electrochemical performance. Abstract : Hierarchical CoMoO4 @NiMoO4 core–shell nanosheet arrays were successfully grown on nickel foam via a facile two-step hydrothermal method followed by calcination treatment. With an ordered core–shell nanostructure and a desired composition, the optimized CoMoO4 @NiMoO4 composite electrode exhibited a high specific capacitance of 1639.8 F g −1 (3.30 F cm −2 ) and an excellent cycling stability with a 95% retention rate at a high current density of 20 mA cm −2 after 3000 cycles. Additionally, an asymmetric supercapacitor (ASC) was assembled with CoMoO4 @NiMoO4 nanosheet arrays/Ni foam as the positive electrode and activated carbon (AC) as the negative electrode, which displayed an energy density of 28.7 W h kg −1 at a power density of 267 W kg −1 . The remarkable electrochemical performance indicated that the CoMoO4 @NiMoO4 composite was a promising electrode material and had great application potential for energy storage.