Preparation of sulfur-doped graphene fibers and their application in flexible fibriform micro-supercapacitors

Abstract

A novel type of sulfur-doped graphene fibers (S-GFs) were prepared by the hydrothermal strategy, the in situ interfacial polymerization method and the annealing method. Two S-GFs were assembled into an all-solid-state fibriform micro-supercapacitor (micro-SC) that is flexible and has a high specific capacitance (4.55 mF·cm⁻²) with the current density of 25.47 μA·cm⁻². The cyclic voltammetry (CV) curve of this micro-SC kept the rectangular shape well even when the scan rate reached 2 V·s⁻¹. There is a great potential for this type of S-GFs used in flexible wearable electronics.

Keywords

graphene fiber / sulfur doping / wearable electronics / flexible supercapacitor / micro-supercapacitor

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