Zhou Zhenjie, Li Peng, Man Zengming, Zhu Xiaolin, Ye Siyuan, Lu Wangyang, Wu Guan, Chen Wenxing
National Engineering Lab for Textile Fiber Materials & Processing Technology, Zhejiang Sci-Tech University, Hangzhou, 310018, P. R. China.
Zhejiang Provincial Innovation Center of Advanced Textile Technology, Shaoxing, 312000, P. R. China.
Angew Chem Int Ed Engl. 2023 May 8;62(20):e202301618. doi: 10.1002/anie.202301618. Epub 2023 Apr 12.
Fiber-shaped supercapacitors (FSCs) have become one of the significantly strategical flexible energy-storage materials towards future wearable textile electronics and metaverse technologies. Here, we develop the high-performance FSCs based on multiscale dot-wire-sheet heterostructure microfiber of nitrogen-doped carbon dots-Ti C T /silk nanofibers (NCDs-Ti C T /SNFs) hybrids via microfluidic fabrication. Due to the enlarged interlayer spacing, plentiful porous channels, accelerated H ion transport dynamics, large electrical conductivity and excellent mechanical strength/flexibility, the NCDs-Ti C T /SNFs possesses high volumetric capacitance (2218.7 F cm ) and reversible charge-discharge stability in 1 M H SO electrolyte. Furthermore, the solid-state FSCs present high energy density (57.9 mWh cm ), good capacitance (1157 F cm ), long-life cycles (82.3 % capacitance retention after 40000 cycles), which realize the actual energy-supply applications (powering lamp, watch and toy car).
纤维状超级电容器（FSCs）已成为面向未来可穿戴纺织电子产品和元宇宙技术的重要战略性柔性储能材料之一。在此，我们通过微流体制备技术，基于氮掺杂碳点-TiC@Ti/Silk纳米纤维（NCDs-TiC@Ti/SNFs）杂化的多尺度点-线-片异质结构微纤维开发了高性能FSCs。由于层间距增大、多孔通道丰富、H⁺离子传输动力学加快、电导率高以及机械强度/柔韧性优异，NCDs-TiC@Ti/SNFs在1M H₂SO₄电解液中具有高体积电容（2218.7 F cm⁻³）和可逆充放电稳定性。此外，固态FSCs具有高能量密度（57.9 mWh cm⁻³）、良好的电容（1157 F cm⁻³）、长寿命循环（40000次循环后电容保持率为82.3%），实现了实际的能量供应应用（为灯、手表和玩具汽车供电）。
