Title
Holistic Processing of Sawdust to Enable Sustainable Hybrid Li-Ion Capacitors
Author
Guo, Xiaoyang (Norwegian University of Science and Technology (NTNU))
van de Kleut, Dick (Beyonder AS, Sandnes)
Zhang, J. (The Hong Kong Polytechnic University)
Chen, C. (TU Delft RST/Storage of Electrochemical Energy)
Wang, Xuehang (TU Delft RST/Storage of Electrochemical Energy) 
Zheng, Tianye (The Hong Kong Polytechnic University)
Boles, Steven (Norwegian University of Science and Technology (NTNU))
Date
2024
Abstract
Activated carbon has long been recognized as a promising electrode material for energy storage devices. The extraordinarily high specific area makes it challenging to replace in supercapacitors since electrical double-layer capacitors need such surfaces but also porous networks to enable electrolyte penetration. As a raw material for synthesizing activated carbon, sawdust offers key benefits, such as its renewability, abundance, favorable physical attributes for energy storage, and a more environmentally friendly synthesis process compared to mined alternative sources. In this work, electrochemical characterization is carried out which highlights the critical role of pelletization in enhancing the capacitive performance of sawdust-derived activated carbon, in addition to the implicit handling and logistical benefits. Subsequently, a Li-ion capacitor is assembled with an organic solvent-based electrolyte, sawdust-derived activated carbon serving as the positive electrode, and an Al-based foil negative electrode, potentially combining high energy and power density materials into a hybrid device. Despite commendable electrochemical performance and the use of a sustainable waste-derived positive electrode with a commoditized negative electrode, challenges remain regarding the ability to mitigate the role of surface functional groups that are stabilized by bio-carbon thermal treatments. Nevertheless, this distinctive architecture holds promise as an alternative high-power energy storage technology for a future filled with renewable energy, electric vehicles, and portable electronic devices.
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http://resolver.tudelft.nl/uuid:b4f4c024-fdc9-47f4-a95f-d78278b1682f
DOI
https://doi.org/10.1007/s11837-024-06542-1
Embargo date
2024-10-15
ISSN
1047-4838
Source
JOM
Bibliographical note
Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.
Part of collection
Institutional Repository
Document type
journal article
Rights
© 2024 Xiaoyang Guo, Dick van de Kleut, J. Zhang, C. Chen, Xuehang Wang, Tianye Zheng, Steven Boles