Macro- and mesoporous nanocellulose beads for use in energy storage devices
2016 (English)In: APPLIED MATERIALS TODAY, ISSN 2352-9407, Vol. 5, 246-254 p.Article in journal (Refereed) Published
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/cm(2) 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
Elsevier, 2016. Vol. 5, 246-254 p.
Supercapacitor, Layer-by-Layer, Size-reduced aerogel, Cellulose nanofibrils
IdentifiersURN: urn:nbn:se:kth:diva-202785DOI: 10.1016/j.apmt.2016.09.008ISI: 000392950300023ScopusID: 2-s2.0-84995564002OAI: oai:DiVA.org:kth-202785DiVA: diva2:1079136
QC 201703072017-03-072017-03-072017-03-08Bibliographically approved