Cellulose-derived carbon nanofibers/graphene composite electrodes for powerful compact supercapacitors
Artikel i vetenskaplig tidskrift, 2017
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.
electrochemical energy-storage
capacitance
carbonization
graphene oxide
reduced
porous
Chemistry
paper-based supercapacitors
enhanced performance
structures
activated carbon
flexible supercapacitors
surface-area
Författare
Volodymyr Kuzmenko
Chalmers, Mikroteknologi och nanovetenskap (MC2), Elektronikmaterial och system
Nan Wang
Chalmers, Mikroteknologi och nanovetenskap (MC2), Elektronikmaterial och system
Mohammad Mazharul Haque
Chalmers, Mikroteknologi och nanovetenskap (MC2), Elektronikmaterial och system
Olga Naboka
National Research Council Canada
M. Flygare
Karlstads universitet
Krister Svensson
Karlstads universitet
Paul Gatenholm
Chalmers, Kemi och kemiteknik, Tillämpad kemi, Polymerteknologi
Wallenberg Wood Science Center (WWSC)
Johan Karlsson
Chalmers, Kemi och kemiteknik, Tillämpad kemi, Teknisk ytkemi
Peter Enoksson
Wallenberg Wood Science Center (WWSC)
Chalmers, Mikroteknologi och nanovetenskap (MC2), Elektronikmaterial och system
RSC Advances
2046-2069 (ISSN)
Vol. 7 73 45968-45977Drivkrafter
Hållbar utveckling
Styrkeområden
Nanovetenskap och nanoteknik (2010-2017)
Transport
Produktion
Energi
Materialvetenskap
Ämneskategorier
Kemiteknik
DOI
10.1039/c7ra07533b