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

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Kuzmenko, Volodymyr,1987Chalmers tekniska högskola,Chalmers University of Technology,Chalmers University of Technology, Gothenburg, Sweden (författare)

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 degrees 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.

Wang, Nan,1988Chalmers tekniska högskola,Chalmers University of Technology,Chalmers University of Technology, Gothenburg, Sweden(Swepub:cth)nwang (författare)
Haque, Mohammad Mazharul,1984Chalmers tekniska högskola,Chalmers University of Technology,Chalmers University of Technology, Gothenburg, Sweden(Swepub:cth)mazharul (författare)
Naboka, Olga,1981National Research Council Canada,National Research Council Canada, Montreal, Canada(Swepub:cth)naboka (författare)
Flygare, MattiasKarlstads universitet,Institutionen för ingenjörsvetenskap och fysik (from 2013)(Swepub:kau)mattflyg (författare)
Svensson, Krister,1969-Karlstads universitet,Institutionen för ingenjörsvetenskap och fysik (from 2013)(Swepub:kau)ksvensso (författare)
Gatenholm, Paul,1956Chalmers tekniska högskola,Chalmers University of Technology,Chalmers University of Technology, Gothenburg, Sweden(Swepub:cth)gatenh (författare)
Karlsson, Johan,1984Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)karjoha (författare)
Enoksson, Peter,1957Chalmers tekniska högskola,Chalmers University of Technology,Chalmers University of Technology, Gothenburg, Sweden(Swepub:cth)enok (författare)
Liu, JohanChalmers University of Technology, Gothenburg, Sweden (författare)
Chalmers tekniska högskolaChalmers University of Technology, Gothenburg, Sweden (creator_code:org_t)

Ingår i:RSC Advances: Royal Society of Chemistry (RSC)7:73, s. 45968-459772046-2069

Av författaren/redakt...: Kuzmenko, Volody ...; Wang, Nan, 1988; Haque, Mohammad ...; Naboka, Olga, 19 ...; Flygare, Mattias; Svensson, Kriste ...; visa fler...; Gatenholm, Paul, ...; Karlsson, Johan, ...; Enoksson, Peter, ...; Liu, Johan; visa färre...

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