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首页> 外文期刊>RSC Advances >Highly flexible all-solid-state cable-type supercapacitors based on Cu/reduced graphene oxide/manganese dioxide fibers
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Highly flexible all-solid-state cable-type supercapacitors based on Cu/reduced graphene oxide/manganese dioxide fibers

机译：基于铜/氧化石墨烯/二氧化锰纤维的高柔性全固态电缆型超级电容器

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摘要

Highly flexible all-solid-state cable-type supercapacitors based on Cu/reduced graphene oxide/manganese dioxide fibers (Cu/RGO/MnO2) were successfully assembled by closely placing two Cu/RGO/MnO2 fibers in a parallel direction and using PVA–KOH gel electrolyte, in which the Cu/RGO/MnO2 fiber electrode, possessing good flexibility, excellent electrochemical properties, and high electrical conductivity was prepared by heating a glass pipeline filled with a Cu wire and a graphene oxide homogenous suspension at 230 °C for 2.5 h. The Cu/reduced graphene fiber was then refluxed in KMnO4 solution at 70 °C for 120 min. As well as being used as a current collector, the Cu wire also served as the matrix for depositing active materials and improving the fiber flexibility, causing a high-quality interfacial contact between the current collector and the active materials. The optimized all-solid-state Cu/RGO/MnO2(6.0) fiber supercapacitor showed a high specific capacitance of 140 mF cm?2 at a current density of 0.1 mA cm?2, enhanced capacitance retention of 97% after 500 bending cycles with a big angle of 120°, and relatively good stability (88% of initial capacitance values after 5000 cycles). Moreover, aside from its excellent electrochemical performance, it could light a LED lamp when connected with a battery, indicating that the assembled Cu/RGO/MnO2 fiber supercapacitor could be used not only as an energy storage device, but also an electrical conduction cable, which could have a significant impact on future energy storage applications.
机译：通过紧密放置成功地组装了基于Cu /还原氧化石墨烯/二氧化锰纤维（Cu / RGO / MnO 2 ）的高柔性全固态电缆型超级电容器使用PVA-KOH凝胶电解质在平行方向上使用两条Cu / RGO / MnO 2 纤维，其中Cu / RGO / MnO 2 <通过将填充有铜丝和氧化石墨烯均质悬浮液的玻璃管道在230°C下加热2.5 h，制得具有良好的柔韧性，优异的电化学性能和高导电性的/ sub> 纤维电极。然后将铜/还原石墨烯纤维在KMnO 4 溶液中于70°C回流120分钟。除了用作集电器之外，Cu线还用作用于沉积活性材料并改善纤维柔韧性的基质，从而引起集电器与活性材料之间的高质量界面接触。优化的全固态Cu / RGO / MnO 2（6.0） 纤维超级电容器显示出140 mF cm ？2 <的高比电容。 / sup> 在0.1 mA cm ？2 的电流密度下，在500个弯曲周期（120°大角度）下，电容保持率提高了97％，和相对好的稳定性（5000次循环后初始电容值的88％）。此外，除具有优异的电化学性能外，与电池连接时还可以点亮LED灯，这表明可以使用组装好的Cu / RGO / MnO 2 光纤超级电容器。不仅可以用作能量存储设备，还可以用作导电电缆，这可能会对未来的能量存储应用产生重大影响。

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