One-step visible laser writing of Cu-doped graphene hybrid structure for in-plane supercapacitor assembly

• Published in: Diamond and related materials 2024-10, Vol.148, p.111515, Article 111515
• Main Authors: Zhou, Xingwen, Zhao, Xinyu, Huang, Yongde, Wang, Xiaonan, Sun, Lining, Chen, Liguo, Sun, Qian
• Format: Article
• Language: English
• Subjects: Hybrid structure; Laser writing; Metal-graphene composite; Supercapacitor; Visible laser
• ISSN: 0925-9635
• DOI: 10.1016/j.diamond.2024.111515

High-quality copper-graphene holds great potential for applications in electronics, but fabricating these hybrid structures in a cost-effective route remains challenging. Herein, we propose a one-step writing process for manufacturing copper-doped graphene hybrid structure using low-cost visible laser. The ionic precursor coated on the surface of polymeric substrate not only acts as a copper source for doping, but also can promote near-surface graphenization of the polymer as proved in this study. The interaction between copper and graphene during this in-situ laser processing has been in-deep discussed to reveal the formation mechanism of the hybrid structure. The obtained hybrid structure shows excellent performance that can assemble high-performance devices, such as the in-plane supercapacitor we demonstrated. This study presents a low-cost, rapid, and efficient strategy for structuring the composites to meet the demands for high-performance structures in booming electronics. [Display omitted] •A one-step laser writing route for manufacturing Cu-doped graphene composites on a flexible substrate was proposed.•The in-situ formed Cu-rich component during processing can improve the quality of visible lase induced graphene.•The mechanism of structural evolution was revealed, and the application of the composites in energy storage were demonstrated.