Cellulose-derived carbon nanofibers/graphene composite electrodes for powerful compact supercapacitors

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DOIResolve DOI: http://doi.org/10.1039/c7ra07533b
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TypeArticle
Journal titleRSC Advances
ISSN2046-2069
Volume73
Issue7
Pages4596845977
AbstractHerein, we demonstrate a unique supercapacitor composite electrode material that is originated from a sustainable cellulosic precursor via simultaneous one-step carbonization/reduction of cellulose/graphene oxide mats at 800 °C. The resulting freestanding material consists of mechanically stable carbon nanofibrous (CNF, fiber diameter 50–500 nm) scaffolds tightly intertwined with highly conductive reduced graphene oxide (rGO) sheets with a thickness of 1–3 nm. The material is mesoporous and has electrical conductivity of 49 S cm−1, attributed to the well-interconnected graphene layers. The electrochemical evaluation of the CNF/graphene composite electrodes in a supercapacitor device shows very promising volumetric values of capacitance, energy and power density (up to 46 F cm−3, 1.46 W h L−1 and 1.09 kW L−1, respectively). Moreover, the composite electrodes retain an impressive 97% of the initial capacitance over 4000 cycles. With these superior properties, the produced composite electrodes should be the “looked-for” components in compact supercapacitors used for increasingly popular portable electronics and hybrid vehicles.
Publication date
PublisherRoyal Society of Chemistry
LanguageEnglish
AffiliationNational Research Council Canada; Energy, Mining and Environment
Peer reviewedYes
NRC numberNRC-EME-55872
NPARC number23002291
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Record identifier5dd31828-cf40-42f8-9496-4f1a889ec2fc
Record created2017-10-11
Record modified2017-10-11
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