Fabrication of PEDOT:PSS/rGO fibers with high flexibility and electrochemical performance for supercapacitors

作者：Liu, Guoqiang; Chen, Xiao; Liu, Jing; Liu, Congcong; Xu, Jingkun^*; Jiang, Qinglin; Jia, Yanhua; Jiang, Fengxing^*; Duan, Xuemin; Liu, Peipei^*

来源：Electrochimica Acta, 2021, 365: 137363.

DOI：10.1016/j.electacta.2020.137363

• PEDOT:PSS
• rGO
• Fiber
• Flexibility
• Supercapacitor

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 P3G7F exhibits improved electrochemical performance including a high specific capacitance (Cs) 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 P3G7F is doubled to 13.9%. A symmetric supercapacitor (SSC) based on the P3G7F 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.

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