Electrochemical Deposition of Manganese Oxide on Paper-Based Laser-Induced Graphene for the Fabrication of Sustainable High-Energy-Density Supercapacitors

Klem, Maykel dos Santos; Abreu, Rodrigo; Pinheiro, Tomás; Coelho, João; Alves, Neri; Martins, Rodrigo

http://hdl.handle.net/10362/178641

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Autores

Klem, Maykel dos Santos

Resumo(s)

Laser-induced graphene (LIG) is widely used to fabricate microsupercapacitors (MSCs) on various sustainable substrates, such as wood, cork, and lignin. However, the fabrication of MSCs, especially high energy density devices on paper, has rarely been reported. In this work, LIG electrodes are fabricated on wax-coated paper, followed by electrochemical deposition of manganese oxide (MnO2). The obtained LIG/MnO2 supercapacitors exhibit a maximum areal capacitance of 86.9 mF cm−2, while a device with pristine LIG electrodes exhibit a capacitance of 9.1 mF cm−2, both measured at a current density of 0.1 mA cm−2. In addition, the supercapacitor exhibits good cycling stability, retaining 80% of its initial capacitance after 1000 charge/discharge cycles at a current density of 1 mA cm−2. Notably, the LIG/MnO2 supercapacitor exhibits an exceptionally high energy density of 7.3 µWh cm−2 at a power density of 38.8 µW cm−2. In summary, a simple, fast, scalable, reproducible, and energy-efficient fabrication method is represented using electrochemical deposition of manganese oxide on paper-based laser-induced graphene, which are natural, abundant, and sustainable materials, paving the way for large-scale production of environmentally friendly supercapacitors.

Descrição

2018/02604-4 and 2022/12332-7, Programa de Pós-graduação em Ciência e Tecnologia de Materiais (POSMAT), Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (Capes), and Instituto Nacional de Eletrônica Orgânica (INEO). This work was also partially supported by the European Union's Horizon Europe research and innovation program under grant agreement number 101096021 (SUPERIOT, HORIZON-JU-SNS-2022-STREAM-B-01-03). T. Pinheiro acknowledges funding from FCT I.P. through the PhD Grant DFA/BD/8606/2020. J.C. also acknowledges the EMERGIA Junta de Andalucia program (EMC21_00174). Publisher Copyright: © 2024 The Author(s). Advanced Sustainable Systems published by Wiley-VCH GmbH.

Palavras-chave

energy storage laser-induced-graphene paper electronics supercapacitor sustainable fabrication Renewable Energy, Sustainability and the Environment General Environmental Science SDG 7 - Affordable and Clean Energy