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.
capacitance
activated carbon
porous
paper-based supercapacitors
structures
Chemistry
graphene oxide
flexible supercapacitors
carbonization
enhanced performance
electrochemical energy-storage
reduced
surface-area
Författare
Volodymyr Kuzmenko
Chalmers, Mikroteknologi och nanovetenskap, Elektronikmaterial
Nan Wang
Chalmers, Mikroteknologi och nanovetenskap, Elektronikmaterial
Mohammad Mazharul Haque
Chalmers, Mikroteknologi och nanovetenskap, Elektronikmaterial
Olga Naboka
National Research Council Canada
M. Flygare
Karlstads universitet
Krister Svensson
Karlstads universitet
Paul Gatenholm
Wallenberg Wood Science Center (WWSC)
Chalmers, Kemi och kemiteknik, Tillämpad kemi
Johan Karlsson
Chalmers, Kemi och kemiteknik, Tillämpad kemi
Peter Enoksson
Wallenberg Wood Science Center (WWSC)
Chalmers, Mikroteknologi och nanovetenskap, Elektronikmaterial
RSC Advances
20462069 (eISSN)
Vol. 7 73 45968-45977Drivkrafter
Hållbar utveckling
Styrkeområden
Nanovetenskap och nanoteknik
Transport
Produktion
Energi
Materialvetenskap
Ämneskategorier (SSIF 2011)
Kemiteknik
DOI
10.1039/c7ra07533b