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Cellulose-derived carbon nanofibers/graphene composite electrodes for powerful compact supercapacitors
Chalmers University of Technology, Gothenburg, Sweden.
Chalmers University of Technology, Gothenburg, Sweden.
Chalmers University of Technology, Gothenburg, Sweden.
National Research Council Canada, Montreal, Canada.
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2017 (Engelska)Ingår i: RSC Advances, ISSN 2046-2069, E-ISSN 2046-2069, Vol. 7, s. 45968-45977Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Herein, 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. 

Ort, förlag, år, upplaga, sidor
Royal Society of Chemistry, 2017. Vol. 7, s. 45968-45977
Nyckelord [en]
super capacitors, cellulose derived, carbon nanofibre, graphene
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URN: urn:nbn:se:kau:diva-64426DOI: 10.1039/c7ra07533bISI: 000412211300010OAI: oai:DiVA.org:kau-64426DiVA, id: diva2:1146079
Forskningsfinansiär
Knut och Alice Wallenbergs Stiftelse, 644378Tillgänglig från: 2017-10-02 Skapad: 2017-10-02 Senast uppdaterad: 2018-12-10Bibliografiskt granskad

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Flygare, MattiasSvensson, Krister

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