Hierarchical core/shell structures of ZnO nanorod@CoMoO4 nanoplates used as a high-performance electrode for supercapacitors. Issue 4 (4th January 2016)

• Record Type: Journal Article
• Authors: Cao, Yunjiu; An, Lei; Liao, Lijun; Liu, Xijian; Ji, Tao; Zou, Rujia; Yang, Jianmao; Qin, Zongyi; Hu, Junqing
• Is Part Of: RSC advances. Volume 6:Issue 4(2016)
• Page Start: 3020
• Page End: 3024
• Publication Date: 2016-01-04
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c5ra21953a
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : ZnO@CoMoO4 core/shell structures as an electrode for supercapacitors exhibited a high specific capacitance of 1.52 F cm −2 (1169 F g −1 ) at 2 mA cm −2 and a good cycling stability of 109% of the initial specific capacitance after 5000 cycles. Abstract : Hierarchical core/shell structures of ZnO nanorod@CoMoO4 nanoplates grown directly on Ni foam were synthesized by a two-step hydrothermal process, in which ZnO nanorod arrays were first grown on Ni foam substrate, and then CoMoO4 nanoplates were grown in multiple directions on each ZnO nanorod. The as-grown ZnO@CoMoO4 core/shell structures (on Ni foam) directly used as integrated electrodes for electrochemical capacitors demonstrated prominent electrochemical performances, i.e., a high specific capacitance of 1.52 F cm −2 at a current density of 2 mA cm −2, which was higher than that (772 mF cm −2 ) of the pure CoMoO4 electrode, and a good long-term cycling stability, in which the electrodes retained 109% of the initial capacitance after 5000 cycles at a scan rate of 50 mV s −1 . The superior electrochemical performances suggest that the ZnO@CoMoO4 core/shell structures could be considered as a prospective electrode material for supercapacitors.