Fabrication of PEDOT:PSS/rGO fibers with high flexibility and electrochemical performance for supercapacitors. (1st January 2021)

• Record Type: Journal Article
• Authors: Liu, Guoqiang; Chen, Xiao; Liu, Jing; Liu, Congcong; Xu, Jingkun; Jiang, Qinglin; Jia, Yanhua; Jiang, Fengxing; Duan, Xuemin; Liu, Peipei
• Is Part Of: Electrochimica acta. Volume 365(2021)
• Publication Date: 2021-01-01
• Subjects: PEDOT:PSS -- rGO -- Fiber -- Flexibility -- Supercapacitor; Electrochemistry -- Periodicals; Electrochemistry, Industrial -- Periodicals; 541.37
• DOI: 10.1016/j.electacta.2020.137363
• Languages: English
• ISSNs: 0013-4686

Abstract

Highlights: PEDOT: PSS/rGO fibers are prepared by easily-accessible hydrothermal confinement reaction. PEDOT:PSS/rGO fiber with simultaneously enhanced capacitance and mechanical properties can be obtained. The fiber-shaped supercapacitor shows a high specific energy density of 10.68 Whkg −1 at the power density of 81.25 W kg −1 . Abstract: Implantable, flexible and easily reconfigurable supercapacitors with high power and energy densities are considered necessary for the development of portable and wearable electronics. However, obtaining a fiber-incorporating high electrochemical performance and fracture elongation remains a huge challenge. Here, we prepare a poly(3, 4-ethylenedioxythiophene):poly(styrenesulfonic acid)/reduced graphene oxide (PEDOT:PSS/rGO) fiber (PGF) with high-quality electrodes for supercapacitors by easily-accessible hydrothermal confinement reaction. The optimized P3 G7 F exhibits improved electrochemical performance including a high specific capacitance ( C s ) of 249.5 F g − 1 at 0.5 A g − 1 and good cycling stability. Moreover, after introducing the PEDOT:PSS, the elongation at break of the P3 G7 F is doubled to 13.9%. A symmetric supercapacitor (SSC) based on the P3 G7 F displays a high specific energy density of 10.68 Wh kg −1 at a specific power density of 81.25 W kg −1 . The improved performance of the fabricated composite fiber is attributed to the unique structures of the rGO and PEDOT:PSS and their synergistic effect. This study introduces an opportunity for the development of next-generation flexible and wearable devices. Graphical abstract: PEDOT:PSS/rGO fibers are prepared via easily-accessible hydrothermal confinement method and the PEDOT:PSS/rGO fibers exhibit good capacitance and mechanical properties. Image, graphical abstract