Functionalized Nanocellulose/Multiwalled Carbon Nanotube Composites for Electrochemical Applications
Year of publication
2021
Authors
Durairaj, Vasuki; Li, Panpan; Liljeström, Touko; Wester, Niklas; Etula, Jarkko; Leppänen, Ilona; Ge, Yanling; Kontturi, Katri S.; Tammelin, Tekla; Laurila, Tomi; Koskinen, Jari
Abstract
<p>Four different types of crystalline and fibrillar nanocellulosic materials with different functional groups (sulfate, carboxylate, amino-silane) are produced and used to disperse commercial multiwalled carbon nanotubes (MWCNT). Aqueous nanocellulose/MWCNT dispersions are drop-cast on tetrahedral amorphous carbon (ta-C) substrates to obtain highly stable composite electrodes. Their electrochemical properties are studied using cyclic voltammetry (CV) measurements with Ru(NH<sub>3</sub>)<sub>6</sub><sup>2+/3+</sup>, IrCl<sub>6</sub><sup>2-/3-</sup> redox probes, in electrolytes of different ionic strengths. All studied nanocellulose/MWCNT composites show excellent stability over a wide potential range (-0.6 to +1 V) in different electrolytes. Highly anionic and more porous fibrillar nanocellulosic composites indicate strong electrostatic and physical enrichment of cationic Ru(NH<sub>3</sub>)<sub>6</sub><sup>2+/3+</sup> in lower-ionic-strength electrolytes, while lesser anionic and denser crystalline nanocellulosic composites show no such effects. This study provides essential insights into developing tailorable nanocellulose/carbon nanomaterial hybrid platforms for different electrochemical applications, by altering the constituent nanocellulosic material properties. </p>
Show moreOrganizations and authors
Publication type
Publication format
Article
Parent publication type
Journal
Article type
Original article
Audience
ScientificPeer-reviewed
Peer-ReviewedMINEDU's publication type classification code
A1 Journal article (refereed), original researchPublication channel information
Journal
Publisher
Volume
4
Issue
6
Pages
5842-5853
ISSN
Publication forum
Publication forum level
1
Open access
Open access in the publisher’s service
Yes
Open access of publication channel
Partially open publication channel
Self-archived
Yes
Other information
Fields of science
Physical sciences; Electronic, automation and communications engineering, electronics; Materials engineering; Nanotechnology
Keywords
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Internationality of the publisher
International
Language
English
International co-publication
No
Co-publication with a company
No
DOI
10.1021/acsanm.1c00774
The publication is included in the Ministry of Education and Culture’s Publication data collection
Yes