【摘要】 基于石墨烯纤维的超级电容器在可穿戴储能设备方面表现出巨大优势。然而，它们较低的比电容和能量密度限制了其应用潜力。本文通过一种简单温和的方法备出了石墨烯/PEDOT:PSS复合纤维，并将其组装成固态超级电容器，通过循环伏安测试、充放电测试等研究其电化学性能。复合纤维较石墨烯纤维表现出更好的性能，0.02 mA/cm~2时比电容达180.95 mF/cm~2,电流密度增大至0.2 mA/cm~2时，复合纤维比电容保持率为70.13%,表现出良好倍率性能。在弯曲角度达90°时，依然保持较高比电容，表现出良好的柔性特征。更多还原

【Abstract】 Supercapacitors based on graphene fibers have shown great advantages for wearable energy storage devices. However, their specific capacitance and energy density are insufficient, limiting their application potential. In this paper, graphene/PEDOT: PSS composite fibers were prepared by a simple and mild method, and then assembled into a solid-state supercapacitor, and its electrochemical properties were investigated by cyclic voltammetry tests and charge/discharge tests.The composite fiber shows better performances than graphene fiber, of which the specific capacitance is 180.95 mF/cm~2 at the current density of 0.02 mA/cm~2, and when the current density increases to 0.2 mA/cm~2, the specific capacitance retention of the composite fiber is 70.13%, showing good rate capability. When bending angle is 90°, It still maintains high specific capacitance, showing good flexibility and potential in application of flexible devices.更多还原