NDLI: Hybrid materials from organic electronic conductors and synthetic-lignin models for charge storage applications

Content Provider	Royal Society of Chemistry (RSC)
Author	Rębiś, Tomasz Nilsson, Ting Yang Inganäs, Olle
Copyright Year	2016
Abstract	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 13C and quantitative 31P 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.
Starting Page	1931
Ending Page	1940
Page Count	10
File Format	HTM / HTML PDF
ISSN	20507488
Volume Number	4
Issue Number	5
Journal	Journal of Materials Chemistry A
DOI	10.1039/c5ta06821e
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Subscribed
Subject Keyword	SEC Syringol Guaiacol Lignin Monomer Hydroquinone Redox Nuclear magnetic resonance Size-exclusion chromatography U.S. Securities and Exchange Commission Composite material Carbon nanotube Polypyrrole Double-layer capacitance Faradaic current Quinone Maximum Capacity Electrode
Content Type	Text
Resource Type	Article
Subject	Chemistry Renewable Energy, Sustainability and the Environment Materials Science

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