Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10656864 | Electrochimica Acta | 2018 | 24 Pages |
Abstract
Cobalt-based composites are generally investigated as cathode for supercapacitor due to its excellent electrochemical properties. Here, we explore its application as anode with the potential window of â0.3-0â¯V in 6â¯M KOH aqueous electrolyte. Interconnected Co3O4/CoO/Co(OH)2 nanosheets array is one-step electrodeposited on the surface of active carbon cloth, but showing low capacitance. Surprisingly, after in-situ compositing with MnO2 (ratio of Mn4+ is â¼23%), the hybrid MnO2/cobalt composites nanosheets array anode delivers â¼705â¯Fâ¯gâ1 at 0.68â¯Aâ¯gâ1, much higher than that of â¼161â¯Fâ¯gâ1 for pristine Co3O4/CoO/Co(OH)2. Besides, using NiCo2S4 nanosheet array@ nickel foam as cathode, the asymmetric supercapacitor exhibits high specific capacitance of 198â¯Fâ¯gâ1 at the current density of 0.5â¯Aâ¯gâ1. This work manifests a promising strategy to explore novel anode material and improve their properties, which holds great promise in energy storage/conversion devices.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Chemical Engineering (General)
Authors
Tianfeng Qin, Shanglong Peng, Jiaxin Hao, Haoqian Li, Yuxiang Wen, Zilei Wang, Juanjuan Huang, Fei Ma, Juan Hou, Guozhong Cao,