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Hybrid materials from organic electronic conductors and synthetic-lignin models for charge storage applications
Linköping University, Department of Physics, Chemistry and Biology, Biomolecular and Organic Electronics. Linköping University, Faculty of Science & Engineering. Poznan University of Tech, Poland.
Linköping University, Department of Biomedical Engineering. Linköping University, Faculty of Science & Engineering.
Linköping University, Department of Physics, Chemistry and Biology, Biomolecular and Organic Electronics. Linköping University, Faculty of Science & Engineering.
2016 (English)In: Journal of Materials Chemistry A, ISSN 2050-7488, Vol. 4, no 5, 1931-1940 p.Article in journal (Refereed) PublishedText
Abstract [en]

Homopolymers and copolymers of the monolignols syringol (S) and guaiacol (G) were prepared as well-defined lignin model compounds. Polymerisation was performed by phenol-formaldehyde condensation, also including the monomer hydroquinone (HQ) to extend the range of redox processes in these synthetic lignins (SLig). The chemical structures of the SLig samples were characterized by C-13 and quantitative P-31 NMR, and the molecular weight was monitored by size exclusion chromatography (SEC). Subsequently, SLig were incorporated into two different electron-conducting matrix - single-wall carbon nanotubes (SWNT) and polypyrrole (PPy), respectively. As a result, the hybrid materials, with a controlled amount of SWNT or with an unknown amount of PPy, were assembled and compared. The charge storage properties in the investigated materials are attributed to contributions from both the double-layer capacitance of the conducting matrix, and the faradaic reactions provided by quinone groups immobilized in the electrodes. The results indicate a considerable improvement of charge capacity, with the synthetic lignins incorporated in the hybrid materials. With a PPy carrying S, G and HQ, better performance is obtained than has previously been obtained with lignin derivatives, showing a maximum capacity of 94 mA h g(-1). Moreover, a low amount of electronic conductor (20% wt of SWNT) is adequate to perform efficient electron communication between redox active quinones and the electrode surface, providing 72 mA h g(-1).

Place, publisher, year, edition, pages
ROYAL SOC CHEMISTRY , 2016. Vol. 4, no 5, 1931-1940 p.
National Category
Biological Sciences
Identifiers
URN: urn:nbn:se:liu:diva-125324DOI: 10.1039/c5ta06821eISI: 000368839200045OAI: oai:DiVA.org:liu-125324DiVA: diva2:906203
Note

Funding Agencies|Knut and Alice Wallenberg Foundation through project Power Papers

Available from: 2016-02-24 Created: 2016-02-19 Last updated: 2016-02-24

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Rebis, TomaszYang Nilsson, TingInganäs, Olle
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Biomolecular and Organic ElectronicsFaculty of Science & EngineeringDepartment of Biomedical Engineering
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