DMSO-treated flexible PEDOT:PSS/PANi fiber electrode for high performance supercapacitors
JOURNAL OF MATERIALS SCIENCE(2021)
摘要
Wearable energy storage device nowadays gains great interest due to sharply increased demand for highly flexible, stretchable and embedded electronics, where fiber-based supercapacitor (FSC) is a competitive counterpart. The poly(3,4-ethylenedioxythiophene):poly(styrenesulfonic acid)/ polyaniline (PEDOT:PSS/PANi) fiber has been prepared via an accessible technique of one-dimensional (1D) self-assembly. Nevertheless, PSS as the main cross-linking matrix may lead to more hopping sites for charge carriers, lessening the continuous electrically conductive path. Herein, PEDOT:PSS/PANi fiber was treated with dimethyl sulfoxide (DMSO) to remove the insulative PSS chains. Coupling high electroactivity of PANi and high conductivity of PEDOT, the optimized DMSO-PEDOT:PSS/PANi fiber displays enhanced electrochemical properties with a high specific capacitance ( C s ) of 367.7 F g −1 at 0.5 A g −1 and good rate capability. Moreover, a symmetric FSC based on the DMSO-P 4 P 6 fiber exhibits a high energy density of 42.4 Wh kg −1 at a power density of 302.3 W kg −1 . Graphical abstract PEDOT: PSS/PANi fibers are prepared via a simple technique of one-dimensional (1D) self-assembly, and the PEDOT: PSS/PANi fiber exhibits superior flexibility, electrical conductivity, and electrochemical properties.
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关键词
high performance supercapacitors,pedotpss/pani fiber electrode,flexible pedotpss/pani,dmso-treated
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