Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7725992 | Journal of Power Sources | 2018 | 9 Pages |
Abstract
Flexible supercapacitors that maintain electrochemical performance under deformation have attracted much attention for the potential application in the flexible electronics market. A compressible and flexible free-standing electrodes sponge and all-solid-state symmetric supercapacitors based on as-prepared electrodes are presented. The carbon nanotubes (CNTs) framework is synthesized by chemical vapor deposition (CVD) method, and then composited with poly (3,4-ethylenedioxythiophene) PEDOT by the electrodeposition. This CNTs/PEDOT sponge electrode shows highest mass-specific capacitance of 147 Fg-1 at 0.5Â AÂ gâ1, tuned by the PEDOT mass loading, and exhibits good cyclic stability with the evidence that more than 95% of capacitance is remained after 3000 cycles. Furthermore, the symmetric supercapacitor shows the highest energy density of 12.6Â Wh kgâ1 under the power density of 1Â kWÂ kgâ1 and highest power density of 10.2Â kWÂ kgâ1 with energy density of 8Â Wh kgâ1, which exhibits both high energy density and power density. The electrochemical performance of composite electrode also indicates that the operate voltage of device could be extend to 1.4Â V by the n-doping and p-doping process in different potential of PEDOT component. This flexible supercapacitor maintains stable electrochemical performance working on different bending condition, which shows promising prospect for wearable energy storage applications.
Related Topics
Physical Sciences and Engineering
Chemistry
Electrochemistry
Authors
Xin He, Wenyao Yang, Xiling Mao, Lu Xu, Yujiu Zhou, Yan Chen, Yuetao Zhao, Yajie Yang, Jianhua Xu,