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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Disclosure of potential conflicts of interests

The authors declare that they have no conflicts of interest.

Acknowledgements

Thank for the National Natural Science Foundation of China (Grant No. 51602358) to support this work, and also thank for the High Level Personnel Fund of Zhoukou Normal University (ZKNU2014117) and the Education Department of Henan Province Natural Science Research Program (18B150029). L.J. acknowledges the Key Laboratory of Polymeric Composite & Functional Materials of Ministry of Education for funding (PCFM-2017-04).

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