Silvestre, Sara L.Morais, MariaSoares, Raquel R. A.Johnson, Zachary T.Benson, EricAinsley, ElisabethPham , VeronicaClaussen, Jonathan C.Gomes, Carmen L.Martins, RodrigoFortunato, ElviraPereira, LuísCoelho, João2024-10-292024-10-292024-08-212365-709XPURE: 94069170PURE UUID: 247adcca-bea2-4c78-80d3-2be9539cf143Scopus: 85193046704WOS: 001224518100001ORCID: /0000-0002-4202-7047/work/170514443http://hdl.handle.net/10362/174198Funding Information: This work was financed by national funds from the FCT\u2014Funda\u00E7\u00E3o para a Ci\u00EAncia e a Tecnologia, I P, in the scope of the projects LA/P/0037/2020, UIDP/50025/2020, and UIDB/50025/2020 of the Associate Laboratory Institute of Nanostructures, Nanomodelling and Nanofabrication\u2014i3N, and 2022.01493.PTDC (GAMBIT). This work was also partially supported by the European Union's Horizon Europe research and innovation program under grant agreement number 101096021 (SUPERIOT, HORIZON\u2010JU\u2010SNS\u20102022\u2010STREAM\u2010B\u201001\u201003). S.L.S. acknowledges PhD grant SFRH/BD/149751/2019. J.C. would like to acknowledge CEEC FCT/MCTES program (CEECIND/00880/2018) and EMERGIA Junta de Andaluc\u00EDa program (EMC21_00174). J.C. Claussen and C.L. Gomes would like to acknowledge funding support from the National Science Foundation under award number CMMI\u2010202307026 (J.C.C.) and NSF PFI\u2010TT\u20102141198 (J.C.C. and C.L.G). This study was supported by a Fulbright / FCT Research Grant, Portugal, AY 2022/2023. The authors thank Amorim Cork Composites for generously providing the cork samples, and to Eric Benson, E. Ainsley, and Veronica Pham from the University of Illinois for supplying the lignin\u2010enriched paper samples used in this study. Publisher Copyright: © 2024 The Authors. Advanced Materials Technologies published by Wiley-VCH GmbH.Extensive research into green technologies is driven by the worldwide push for eco-friendly materials and energy solutions. The focus is on synergies that prioritize sustainability and environmental benefits. This study explores the potential of abundant, non-toxic, and sustainable resources such as paper, lignin-enriched paper, and cork for producing laser-induced graphene (LIG) supercapacitor electrodes with improved capacitance. A single-step methodology using a CO2 laser system is developed for fabricating these electrodes under ambient conditions, providing an environmentally friendly alternative to conventional carbon sources. The resulting green micro-supercapacitors (MSCs) achieve impressive areal capacitance (≈7–10 mF cm−2) and power and energy densities (≈4 μW cm-2 and ≈0.77 µWh cm−2 at 0.01 mA cm−2). Stability tests conducted over 5000 charge–discharge cycles demonstrate a capacitance retention of ≈80–85%, highlighting the device durability. These LIG-based devices offer versatility, allowing voltage output adjustment through stacked and sandwich MSCs configurations (parallel or series), suitable for various large-scale applications. This study demonstrates that it is possible to create high-quality energy storage devices based on biodegradable materials. This development can lead to progress in renewable energy and off-grid technology, as well as a reduction in electronic waste.123911665engcellulose-based substratesdirect laser writinggreen electronicssupercapacitorssustainabilityGeneral Materials ScienceMechanics of MaterialsIndustrial and Manufacturing EngineeringSDG 7 - Affordable and Clean EnergySDG 12 - Responsible Consumption and ProductionSDG 13 - Climate Actionjournal article10.1002/admt.202400261https://www.scopus.com/pages/publications/85193046704