A high performance all-solid-state flexible supercapacitor based on carbon nanotube fiber/carbon nanotubes/polyaniline with a double core-sheathed structure

• Published in: Electrochimica acta Vol. 283; pp. 366 - 373
• Main Authors: Liu, Jia-hua, Xu, Xiao-ying, Lu, Weibang, Xiong, Xinbo, Ouyang, Xing, Zhao, Changhui, Wang, Fei, Qin, Si-yin, Hong, Jiao-ling, Tang, Jiao-ning, Chen, Da-Zhu
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 01.09.2018; Elsevier BV
• Subjects: Capacitance; Carbon; Carbon nanotube fiber; Carbon nanotubes; Deformation; Electronic devices; Electrophoretic deposition; Flexibility; Nanotubes; Polyaniline; Polyanilines; Solid state; Solid state physics; Supercapacitors; Supercapacitors; Carbon nanotube fiber; Polyaniline; Flexibility; Electrophoretic deposition
• ISSN: 0013-4686; 1873-3859
• DOI: 10.1016/j.electacta.2018.06.158

A new type of ternary carbon nanotube fiber (CNF)/three-dimensional (3D) porous carbon nanotubes (CNTs)/polyaniline (PANI) electrodes with a double core-sheathed architecture composed of CNF/CNTs and CNTs/PANI was fabricated via low-potential electrophoretic deposition of CNTs and subsequent electrochemical polymerization of PANI on the CNF surface. The resulting all-solid-state supercapacitor possesses a high specific capacitance of 67.31 mF cm−2 at the current density of 0.5 mA cm−2 and only a loss as less as 10% of its initial specific capacitance after 5000 charge-discharge cycles. Furthermore, it is capable of withstanding different bending deformations, and can maintain 99.8% capacitance, even after experiencing the bending of 180° for 500 times, which manifests a significant application potential in the field of flexible electronic devices. [Display omitted] •The fiber electrodes modified with 3D porous CNTs and polyaniline were realized.•The decorated ternary fiber based all-solid-state supercapacitor was fabricated.•The capacitance of the supercapacitor was remarkably enhanced.•The supercapacitor demonstrated an excellent cyclic stability.•The supercapacitor kept a high level of capacitance after bending 500 times.