Hydrothermal Synthesized of CoMoO4 Microspheres as Excellent Electrode Material for Supercapacitor

• Main Authors: Weixia Li, Xianwei Wang, Yanchun Hu, Lingyun Sun, Chang Gao, Cuicui Zhang, Han Liu, Meng Duan
• Format: Article
• Language: English
• Published: SpringerOpen 2018-04-01
• Series: Nanoscale Research Letters
• Subjects: Hydrothermal method; CoMoO4; Supercapacitor; Electrode material
• Online Access: http://link.springer.com/article/10.1186/s11671-018-2540-3

Abstract The single-phase CoMoO4 was prepared via a facile hydrothermal method coupled with calcination treatment at 400 °C. The structures, morphologies, and electrochemical properties of samples with different hydrothermal reaction times were investigated. The microsphere structure, which consisted of nanoflakes, was observed in samples. The specific capacitances at 1 A g−1 are 151, 182, 243, 384, and 186 F g−1 for samples with the hydrothermal times of 1, 4, 8, 12, and 24 h, respectively. In addition, the sample with the hydrothermal time of 12 h shows a good rate capability, and there is 45% retention of initial capacitance when the current density increases from 1 to 8 A g−1. The high retain capacitances of samples show the fine long-cycle stability after 1000 charge-discharge cycles at current density of 8 A g−1. The results indicate that CoMoO4 samples could be a choice of excellent electrode materials for supercapacitor.