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Electrochemical characteristics of lignin in CTMP for paper battery electrodes.
Linköping University, Sweden.
RISE Research Institutes of Sweden, Bioeconomy and Health, Pulp, Paper and Packaging.ORCID iD: 0000-0003-0385-6202
RISE Research Institutes of Sweden, Bioeconomy and Health, Material and Surface Design.ORCID iD: 0000-0001-6495-0492
RISE Research Institutes of Sweden, Bioeconomy and Health, Material and Surface Design.ORCID iD: 0000-0003-0838-3977
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2024 (English)In: ChemSusChem, ISSN 1864-5631, E-ISSN 1864-564X, article id e202400222Article in journal (Refereed) Published
Abstract [en]

Lignin has been extensively researched as a cathode active material in secondary batteries. In the present work, the energy storage potential of lignin naturally present in papers made of chemi-thermomechanical pulp (CTMP) is explored. More specifically, effects from CTMP fines on the electrochemical characteristics have been studied. Compared to pulp fibers, fines are higher in lignin content and have higher specific surface area. It was expected that this would be positive for the electrode performance; however, the result points to the opposite. The fines do not significantly contribute to a higher lignin specific capacity, and they deteriorate the cycling stability. Higher fines content was found to result in a higher oxidative activity as well as more abundant competing reactions. These competing reactions are believed to be linked to the cycle stability. Therefore, we hypothesize that the electrochemical stability of lignin can be better understood by studying differences between fines and fiber lignin. As the theoretical specific capacity of this material is about 20 times larger than obtained here, identification of the reasons for this capacity discrepancy is needed to realize the full potential of lignin-based paper batteries.

Place, publisher, year, edition, pages
2024. article id e202400222
Keywords [en]
CTMP, Fines, Lignin, PEDOT:PSS, electrochemistry
National Category
Materials Engineering
Identifiers
URN: urn:nbn:se:ri:diva-73746DOI: 10.1002/cssc.202400222OAI: oai:DiVA.org:ri-73746DiVA, id: diva2:1877087
Note

This work has been carried out in the Digital Cellulose Center, acompetence center set up by the Swedish Innovation AgencyVINNOVA (grant no. 2016-05193) and an industry consortium.Here, we have been kindly supplied with PEDOT:PSS from Agfa,pulp from Stora Enso, and have also kindly got SEM/EDX imagingand pulp lignin content determined by the analytical science teamat Ahlstrom

Available from: 2024-06-25 Created: 2024-06-25 Last updated: 2024-06-25Bibliographically approved

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Björk, ElisabethCapanema, EwellynGranberg, Hjalmar

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