Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5460890 | Journal of Alloys and Compounds | 2017 | 51 Pages |
Abstract
A novel supercapacitor system with an ultrahigh electrochemical performance was prepared by applying a multi-walled carbon nanotubes (MWCNTs) - polyaniline (PANI) composite electrode and a redox potassium iodide (KI) electrolyte. The composite electrode possessed a good conductivity and a consecutive 3D conductive network. The amazing electrochemical performance came from the simultaneous redox reaction in both electrode and electrolyte. The maximum discharge specific capacitance was up to 4960Â F/g (0.1Â A/g) when the concentration of KI electrolyte was only 0.05Â M in a three-electrode system. After 1000 charge-discharge cycles, it still reached to 1550Â F/g when the current density was increased to 1.5Â A/g. Furthermore, the specific capacitance, energy density and power density of 726Â F/g, 100.8Â Wh/kg and 499.8Â W/kg, respectively, were also obtained in an asymmetric two-electrode system.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
You Zhang, Lei Zu, Huiqin Lian, Zhongkai Hu, Yanhua Jiang, Yang Liu, Xiaodong Wang, Xiuguo Cui,