Huang Fei, Feng Guoying, Yin Jiajia, Zhou Sikun, Shen Li, Wang Shutong, Luo Yun
College of Electronics and Information Engineering, Sichuan University, Chengdu 610065, China.
Institute of Optics and Electronics, Chinese Academy of Sciences, P.O. Box 350, Chengdu 610209, China.
Nanomaterials (Basel). 2020 Dec 18;10(12):2547. doi: 10.3390/nano10122547.
Direct laser writing (DLW) is a convenient approach for fabricating graphene-based flexible electronic devices. In this paper, laser-induced graphene was successfully prepared on a thin and transparent polyimide film through the DLW process. Experiments have demonstrated that interdigital thin film capacitor prepared by the DLW method has a high specific capacitance of 8.11 mF/cm and volume capacitance density of 3.16 F/cm (0.05 mA/cm) due to the doped fluoride in the laser-induced graphene. The capacitance is about 20 times larger than the super-capacitor based non-transparent polyimide film of the same thickness. Owing to its thin, flexible, higher electrochemical characteristics, the transparent polyimide film is promising for integrating and powering portable and wearable electronics.
直接激光写入（DLW）是一种用于制造基于石墨烯的柔性电子器件的便捷方法。在本文中，通过DLW工艺在薄而透明的聚酰亚胺薄膜上成功制备了激光诱导石墨烯。实验表明，由于激光诱导石墨烯中掺杂了氟化物，采用DLW方法制备的叉指式薄膜电容器具有8.11 mF/cm的高比电容和3.16 F/cm³（0.05 mA/cm²）的体积电容密度。该电容比相同厚度的基于非透明聚酰亚胺薄膜的超级电容器大20倍左右。由于其薄、柔性以及更高的电化学特性，透明聚酰亚胺薄膜在集成和为便携式及可穿戴电子产品供电方面具有广阔前景。
