Cellulose-derived carbon nanofibers/graphene composite electrodes for powerful compact supercapacitors
Journal article, 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
Author
Volodymyr Kuzmenko
Chalmers, Microtechnology and Nanoscience (MC2), Electronics Material and Systems
Nan Wang
Chalmers, Microtechnology and Nanoscience (MC2), Electronics Material and Systems
Mohammad Mazharul Haque
Chalmers, Microtechnology and Nanoscience (MC2), Electronics Material and Systems
Olga Naboka
National Research Council Canada
M. Flygare
Karlstad University
Krister Svensson
Karlstad University
Paul Gatenholm
Wallenberg Wood Science Center (WWSC)
Chalmers, Chemistry and Chemical Engineering, Applied Chemistry
Johan Karlsson
Chalmers, Chemistry and Chemical Engineering, Applied Chemistry
Peter Enoksson
Wallenberg Wood Science Center (WWSC)
Chalmers, Microtechnology and Nanoscience (MC2), Electronics Material and Systems
RSC Advances
20462069 (eISSN)
Vol. 7 73 45968-45977Driving Forces
Sustainable development
Areas of Advance
Nanoscience and Nanotechnology
Transport
Production
Energy
Materials Science
Subject Categories
Chemical Engineering
DOI
10.1039/c7ra07533b