Journal
ELECTROCHIMICA ACTA
Volume 270, Issue -, Pages 205-214Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2018.03.067
Keywords
Cotton yarn; Polyaniline; Flexible supercapacitor; Graphene; Fiber
Categories
Funding
- National Natural Science Foundation of China [51402048]
- Fundamental Research Funds for the Central Universities
- DHU Distinguished Young Professor Program
- Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry
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A high-performance yarn electrode material, cotton/graphene/polyaniline, is synthesized by coating primary fiber cores inside cotton yarns with graphene sheets and followed by further growing polyaniline nanowire array layers through in situ polymerization of aniline. The electron transportation is enhanced by the 3D graphene conductive network on cotton fibers, which further bridges the polyaniline nanowires. The polyaniline nanowires with small diameters ensure high electrochemically active surface area. The spaces within the polyaniline nanowire array layers and the hierarchical pores of the entire yarn electrode benefit the fast electrolyte ion diffusion. The unique 3D yarn electrode structure results in an excellent electrochemical performance. The maximum areal capacitance and capacitance retention are 246 mF/cm(2) at 5 mV/s and 98% after 3800 cycles, respectively. A symmetric all-solid-state yarn supercapacitor is fabricated by using this yarn electrode, which delivers an energy density of 9.7 mu Wh/cm(2) at a power density of 840.9 mu W/cm(2). (c) 2018 Elsevier Ltd. All rights reserved.
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