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Large-Scale Nanographite Exfoliation for Low-Cost Metal-Free Supercapacitors
Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.ORCID iD: 0000-0002-4303-2585
2016 (English)Licentiate thesis, comprehensive summary (Other academic)
Place, publisher, year, edition, pages
Sundsvall: Mid Sweden University , 2016. , 34 p.
Series
Mid Sweden University licentiate thesis, ISSN 1652-8948 ; 125
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:miun:diva-29720ISBN: 978-91-88025-74-6 (print)OAI: oai:DiVA.org:miun-29720DiVA: diva2:1058727
Presentation
2016-08-31, O102, Sundsvall, 10:30 (English)
Supervisors
Note

Vid tidpunkten för framläggningen av avhandlingen var följande delarbeten opublicerade: delarbete 2 inskickat.

At the time of the defence the following papers were unpublished: paper 2 submitted.

Available from: 2016-12-21 Created: 2016-12-21 Last updated: 2016-12-21Bibliographically approved
List of papers
1. Large-Scale Production of Nanographite by Tube-Shear Exfoliation in Water
Open this publication in new window or tab >>Large-Scale Production of Nanographite by Tube-Shear Exfoliation in Water
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2016 (English)In: PLoS ONE, ISSN 1932-6203, E-ISSN 1932-6203, Vol. 11, no 4, e0154686Article in journal (Refereed) Published
Abstract [en]

The number of applications based on graphene, few-layer graphene, and nanographite is rapidly increasing. A large-scale process for production of these materials is critically needed to achieve cost-effective commercial products. Here, we present a novel process to mechanically exfoliate industrial quantities of nanographite from graphite in an aqueous environment with low energy consumption and at controlled shear conditions. This process, based on hydrodynamic tube shearing, produced nanometer-thick and micrometer-wide flakes of nanographite with a production rate exceeding 500 gh-1 with an energy consumption about 10 Whg-1. In addition, to facilitate large-area coating, we show that the nanographite can be mixed with nanofibrillated cellulose in the process to form highly conductive, robust and environmentally friendly composites. This composite has a sheet resistance below 1.75 Ω/sq and an electrical resistivity of 1.39×10-4 Ωm and may find use in several applications, from supercapacitors and batteries to printed electronics and solar cells. A batch of 100 liter was processed in less than 4 hours. The design of the process allow scaling to even larger volumes and the low energy consumption indicates a low-cost process.

Place, publisher, year, edition, pages
Nicklas Blomquist, 2016
Keyword
Nano-graphite, Graphite, Graphene, Nanomaterials, Composite materials
National Category
Natural Sciences
Identifiers
urn:nbn:se:miun:diva-27600 (URN)10.1371/journal.pone.0154686 (DOI)000375212600060 ()2-s2.0-84966389426 (Scopus ID)
Projects
KEPS
Funder
Swedish Energy Agency
Available from: 2016-05-09 Created: 2016-05-09 Last updated: 2017-11-30Bibliographically approved

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