Simple fabrication of laser-induced graphene functionalized with a copper-based metal– organic framework and its application in solid-state supercapacitors Morales Cámara, Samuel Toral López, Víctor Vitorica-Yrezabal, Iñigo Javier Rivadeneyra Torres, Almudena Pereira, Luis Rojas Macías, Sara Romero, Francisco J. Flexible thin-film electronics based on functionalized laser-induced graphene (LIG) hold great promise for a diverse range of applications, including biosensors and energy storage devices. In this study, we present a simple and direct method for synthesizing LIG functionalized with a copper-based metal–organic framework (MOF). The proposed synthesis procedure involves a one-step laser photothermal process on the surface of a carbon-rich polyimide to obtain LIG, followed by a simple layer-by-layer technique for growing Cu-BTC crystals within the porous structure of LIG. Structural characterization through various techniques confirms the successful deposition of crystalline Cu-BTC within the electrically conductive LIG surface. Cu-BTC@LIG composites are highly valuable candidate materials for multiple applications. In particular, we demonstrate the use of Cu-BTC@LIG as an electrode for electrochemical supercapacitors, increasing the specific capacitance by up to six times compared to LIG-only electrodes (reaching values of 2.8 mF cm−2 at 54.3 μA cm−2 or 2.1 mF cm−2 at 10 mV s−1) due to the double layer capacitance and pseudocapacitance contribution of Cu-BTC. The Cu-BTC@LIG electrodes also exhibit superior energy density (7.4 times higher at a power density of 21.26 μW cm−2) and stability over multiple charge–discharge cycles (>5000), making it a promising material not only for energy-storage devices but also for numerous applications in flexible electronics. 2024-07-19T09:21:16Z 2024-07-19T09:21:16Z 2024-05-02 journal article Morales Cámara, S. et. al. Journal of Materials Chemistry C. 2024,12, 7784-7796. [https://doi.org/10.1039/D4TC00558A] https://hdl.handle.net/10481/93251 10.1039/D4TC00558A eng http://creativecommons.org/licenses/by-nc/4.0/ open access Atribución-NoComercial 4.0 Internacional Royal Society of Chemistry