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.

中文翻译：

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硫掺杂石墨烯纤维的制备及其在柔性纤维状微超级电容器中的应用

通过水热法，原位界面聚合法和退火法制备了一种新型的硫掺杂石墨烯纤维（S-GFs）。将两个S-GF组装成一个全固态纤维状微超级电容器（micro-SC），该电容器超级灵活，具有高比电容（4.55 mF·cm ^-2），电流密度为25.47 µA·cm ^-2。即使扫描速率达到2 V·s ^-1时，该微型SC的循环伏安曲线（CV）仍保持矩形良好。在柔性可穿戴电子产品中使用这种S-GF的潜力很大。