Supercapacitors based on flexible fabrics are considered promising wearable energy storage devices due to their skin adaptability and high mechanical properties. However, enhancing the electrical conductivity of flexible fabric substrates and optimizing the loading of active materials remains a challenge. Here, we propose a concept of functionalized ink interlayer to improve the performance of fabric-based supercapacitors. The functionalized ink interlayer not only has good electrical conductivity but also guides the loading of polyaniline (PANI) and facilitates charge transfer at the electrode/electrolyte interface, generating a synergistic effect with the active material. The areal capacitance (323.3 mF cm^-2) of cotton fabric/conductive carbon oil/ink@PANI supercapacitor is greater than the sum (210.2 mF cm^-2) of cotton fabric/conductive carbon oil/ink supercapacitor and cotton fabric/conductive carbon oil@PANI supercapacitor. Additionally, the maximum energy density of supercapacitor with ink interlayer is 28.5 μWh cm^-2 and the maximum power density is 2057 μW cm^-2. The electrode with ink interlayer can maintain a fast electrodynamic process and the cycling stability is also improved. Finally, interdigital and tree-like clothing appliques were prepared and sewn onto clothing to realize wearable energy storage function using ink@PANI-based electrodes. This work provides important references for the development of fabric-based supercapacitors.

基于柔性织物的超级电容器由于其皮肤适应性和高机械性能被认为是有前途的可穿戴储能设备。然而，提高柔性织物基材的导电性和优化活性材料的负载仍然是一个挑战。在这里，我们提出了功能化油墨中间层的概念，以提高基于织物的超级电容器的性能。功能化的油墨夹层不仅具有良好的导电性，还可以引导聚苯胺（PANI）的负载，促进电极/电解质界面的电荷转移，与活性材料产生协同效应。棉织物/导电碳油/墨水@PANI超级电容器的面电容（323.3 mF cm ^-2）大于总和（210.2 mF cm^-2 )棉织物/导电碳油/油墨超级电容器和棉织物/导电碳油@PANI超级电容器。此外，油墨夹层超级电容器的最大能量密度为28.5 μWh cm ^-2，最大功率密度为2057 μW cm ^-2。具有油墨夹层的电极可以保持快速的电动力学过程，循环稳定性也得到提高。最后，制备叉指和树状服装贴花并将其缝在衣服上，以使用基于 ink@PANI 的电极实现可穿戴储能功能。该工作为基于织物的超级电容器的开发提供了重要参考。