Ye Chuangen, Yang Qingfeng, Xu Mingxian, Qiu Haitang, Zhang Xiaozhen, Ma Jianping, Gao Haiyang, Feng Xuansheng, Li Yong
High-tech Industry (Pilot) Base, Advanced Materials Institute, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250014, China.
Qingdao Campus of Naval Aviation University, Qingdao 310018, China.
Nanomaterials (Basel). 2025 Sep 2;15(17):1350. doi: 10.3390/nano15171350.
The development of portable and wearable electronics has promoted the advancement of fiber supercapacitors (FSCs), but their low energy density still limits their application in flexible devices. Herein, we incorporated micron-sized graphene dispersions at varying concentrations into the polyaniline (PANI) precursor solution prepared via electrochemical polymerization and subsequently electrodeposited PANI/graphene composites onto the surface of carbon nanotube (CNT) fibers, ultimately obtaining fibrous PANI/graphene@CNT composite electrodes. This electrode material not only exhibits the superior electrochemical activity characteristic of conducting polymers synthesized by electrochemical polymerization but also possesses a relatively high specific surface area. Furthermore, we fabricated coaxial fiber supercapacitors using PANI/graphene@CNT composite fibers and CNT films as the positive and negative electrode materials, respectively. The maximum energy density and power density could reach 160.5 µWh cm and 13 mW cm respectively, proving its excellent energy storage and output capabilities. More importantly, the prepared CFASC device showed remarkable mechanical and electrochemical durability. Even after 3000 bending cycles, it retained 89.77% of its original capacitance, highlighting its promising applicability in the realm of flexible electronics. The resulting devices demonstrate excellent electrochemical performance and mechanical stability.
便携式和可穿戴电子设备的发展推动了纤维超级电容器（FSCs）的进步，但其低能量密度仍然限制了它们在柔性设备中的应用。在此，我们将不同浓度的微米级石墨烯分散体掺入通过电化学聚合制备的聚苯胺（PANI）前驱体溶液中，随后将聚苯胺/石墨烯复合材料电沉积到碳纳米管（CNT）纤维表面，最终获得纤维状聚苯胺/石墨烯@碳纳米管复合电极。这种电极材料不仅展现出通过电化学聚合合成的导电聚合物的优异电化学活性特性，还具有相对较高的比表面积。此外，我们分别使用聚苯胺/石墨烯@碳纳米管复合纤维和碳纳米管薄膜作为正负极材料制备了同轴纤维超级电容器。其最大能量密度和功率密度分别可达160.5 μWh cm和13 mW cm，证明了其优异的能量存储和输出能力。更重要的是，所制备的同轴纤维超级电容器器件表现出显著的机械和电化学耐久性。即使经过3000次弯曲循环后，它仍保留其原始电容的89.77%，突出了其在柔性电子领域的应用前景。所得器件展现出优异的电化学性能和机械稳定性。
