Liang Yue, Gao Jian, Wang Qiang, Lu Nan, Zhang Yong-Chao, Zhu Xiao-Dong
State Key Laboratory Base for Eco-Chemical Engineering, College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao, 266042, P. R. China.
Small Methods. 2025 Apr;9(4):e2401581. doi: 10.1002/smtd.202401581. Epub 2024 Dec 8.
The limited energy density of micro-supercapacitors (MSCs) and challenges in their integration significantly impede the advancement of MSCs in wearable electronic devices. Here, this work designs a robust and wrinkled liquid metal-CNT-PEDOT:PSS film with high capacity and self-healing properties (defined as LM-CNT-PEDOT:PSS). The wrinkled structure further enhances tensile properties of LM-CNT-PEDOT:PSS and increases its active specific surface area per unit. Simultaneously, the incorporation of liquid metal (LM) enhances both the mechanical and healing properties of the LM-CNT-PEDOT:PSS electrode. The flexible and self-healing MSC based on wrinkled LM-CNT-PEDOT:PSS shows a remarkable specific capacitance of 114.29 mF cm and a high areal energy density of 15.47 µW h cm. Furthermore, the electrochemical performance of the healed MSC retained 90.01% of its initial performance, and the MSC unit can be arbitrarily integrated according to various energy and voltage requirements through the healing properties of LM-CNT-PEDOT:PSS, widening the range of applications in next-generation microelectronic devices. The wrinkled LM-CNT-PEDOT:PSS film is utilized for the fabrication of a highly sensitive strain sensor. Simultaneously, the prepared sensor can be seamlessly integrated with wireless charging and MSC to facilitate convenient monitoring of physiological signals, thereby offering an effective solution for the advancement of wearable technology and self-powered systems.
微型超级电容器（MSCs）有限的能量密度及其集成方面的挑战严重阻碍了其在可穿戴电子设备中的发展。在此，本工作设计了一种具有高容量和自修复性能的坚固且有褶皱的液态金属 - 碳纳米管 - 聚（3,4 - 乙撑二氧噻吩）：聚苯乙烯磺酸盐薄膜（定义为LM - CNT - PEDOT:PSS）。这种褶皱结构进一步增强了LM - CNT - PEDOT:PSS的拉伸性能，并增加了其单位活性比表面积。同时，液态金属（LM）的加入增强了LM - CNT - PEDOT:PSS电极的机械性能和自修复性能。基于有褶皱的LM - CNT - PEDOT:PSS的柔性自修复微型超级电容器显示出114.29 mF/cm的显著比电容和15.47 μW h/cm²的高面积能量密度。此外，修复后的微型超级电容器的电化学性能保留了其初始性能的90.01%，并且通过LM - CNT - PEDOT:PSS的自修复性能，微型超级电容器单元可以根据各种能量和电压要求进行任意集成，拓宽了在下一代微电子设备中的应用范围。有褶皱的LM - CNT - PEDOT:PSS薄膜被用于制造高灵敏度应变传感器。同时，所制备的传感器可以与无线充电和微型超级电容器无缝集成，以方便对生理信号进行监测，从而为可穿戴技术和自供电系统的发展提供了一种有效的解决方案。
