Jiang Xuening, Gao Rixia, Liu Gang, Luo Hao, Zhao Xueping, Jiang Lei
Key Laboratory of Materials Modification by Laser, Ion and Electron Beams Dalian University of Technology, Ministry of Education, School of Physics, Dalian, 116024, P. R. China.
Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, P. R. China.
Small Methods. 2022 May;6(5):e2101454. doi: 10.1002/smtd.202101454. Epub 2022 Mar 6.
Flexible micro-supercapacitors (MSCs) are promising power sources of portable/wearable electronic devices. Electrodes are the key components determining performance of the MSCs, but it still remains a big challenge in either materials or fabrication methods to achieve both high charge storage capability and robust mechanical flexibility. Herein, a novel water-cooling assisted selective laser ablation (WASLA) technique is demonstrated for scale-fabrication of "embedded-in-paper" 3D graphene-cellulose composite interdigital electrodes (3D GCCIEs) in a mask-free and chemical-free manner. The obtained electrodes are endowed with 3D charge storage geometry, high electrical conduction, freely designed patterns, and the inherent advantages of paper substrate. Therefore, the 3D GCCIEs-based MSC exhibits excellent overall performance including large specific capacitances, high rate performance, impressive cyclic stability, and remarkable mechanical flexibility. Moreover, metal-free 3D GCCIE-MSC integrated arrays with diverse shapes composed of linear/curved interdigital electrodes are also fabricated, and a letter-shaped MSC array successfully lit a light emitting diode light in both flat and folded status demonstrating excellent device flexibility. The as-fabricated 3D GCCIE-MSCs have shown great application potential as power sources of flexible electronic devices, and the WASLA method proves to be an effective strategy for scale-manufacturing high performance paper-based charge storage devices not limited to supercapacitors.
柔性微型超级电容器（MSCs）是便携式/可穿戴电子设备中很有前景的电源。电极是决定MSCs性能的关键组件，但在材料或制造方法方面，要实现高电荷存储能力和强大的机械柔韧性仍然是一个巨大的挑战。在此，展示了一种新颖的水冷辅助选择性激光烧蚀（WASLA）技术，用于以无掩膜和无化学物质的方式大规模制造“纸中嵌入”的三维石墨烯-纤维素复合叉指电极（3D GCCIEs）。所获得的电极具有三维电荷存储几何结构、高导电性、可自由设计的图案以及纸基衬底的固有优点。因此，基于3D GCCIEs的MSCs表现出优异的综合性能，包括大的比电容、高倍率性能、令人印象深刻的循环稳定性和卓越的机械柔韧性。此外，还制造了由线性/弯曲叉指电极组成的具有不同形状的无金属3D GCCIE-MSC集成阵列，一个字母形状的MSC阵列在平坦和折叠状态下均成功点亮了发光二极管灯，展示了出色的器件柔韧性。所制造的3D GCCIE-MSCs作为柔性电子设备的电源已显示出巨大的应用潜力，并且WASLA方法被证明是一种有效的策略，可用于大规模制造不限于超级电容器的高性能纸基电荷存储器件。
