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Macro- and mesoporous nanocellulose beads for use in energy storage devices
RISE, Innventia.ORCID iD: 0000-0003-0838-3977
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2016 (English)In: Applied Materials Today, ISSN 23529407, Vol. 5, 246-254 p.Article in journal (Refereed) Published
Abstract [en]

Chemically cross-linked, wet-stable cellulose nanofibril (CNF) aerogel beads were fabricated using a novel procedure. The procedure facilitated controlled production of millimetre-sized CNF aerogel beads without freeze-drying or critical point drying, while still retaining a highly porous structure with low density. The aerogel beads were mechanically robust in the dry state, supporting loads of 1.3 N at 70% compression, even after being soaked in water and re-dried. Furthermore, they displayed both a good stability in water and a remarkably good shape recovery after wet compression. Owing to the stability in water, the entire surface of the highly porous aerogel beads could be successfully functionalized with polyelectrolytes and carboxyl-functionalized single-wall carbon nanotubes (CF-SWCNTs) using the Layer-by-Layer technique, introducing a significant electrical conductivity (1.6 mS/cm) to the aerogel beads. The functionalized, electrically conducting aerogel beads could carry as much as 2 kA/cm2 and act as electrodes in a supercapacitor displaying a stabilized charge storage capacity of 9.8 F/g after 50 charging–discharging cycles.

Place, publisher, year, edition, pages
2016. Vol. 5, 246-254 p.
National Category
Nano Technology
Identifiers
URN: urn:nbn:se:ri:diva-27567DOI: 10.1016/j.apmt.2016.09.008Scopus ID: 2-s2.0-84995564002OAI: oai:DiVA.org:ri-27567DiVA: diva2:1056557
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Available from: 2016-12-15 Created: 2016-12-15 Last updated: 2016-12-15Bibliographically approved

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