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.

electrochemical energy-storage

capacitance

carbonization

graphene oxide

reduced

porous

Chemistry

paper-based supercapacitors

enhanced performance

structures

activated carbon

flexible supercapacitors

surface-area

Author

Volodymyr Kuzmenko

Chalmers, Microtechnology and Nanoscience (MC2), Electronics Material and Systems Laboratory

Nan Wang

Chalmers, Microtechnology and Nanoscience (MC2), Electronics Material and Systems Laboratory

Mohammad Mazharul Haque

Chalmers, Microtechnology and Nanoscience (MC2), Electronics Material and Systems Laboratory

Olga Naboka

National Research Council Canada

M. Flygare

Karlstad University

Krister Svensson

Karlstad University

Paul Gatenholm

Chalmers, Chemistry and Chemical Engineering, Applied Chemistry, Polymer Technology

Wallenberg Wood Science Center (WWSC)

Johan Karlsson

Chalmers, Chemistry and Chemical Engineering, Applied Chemistry, Applied Surface Chemistry

Peter Enoksson

Wallenberg Wood Science Center (WWSC)

Chalmers, Microtechnology and Nanoscience (MC2), Electronics Material and Systems Laboratory

RSC Advances

2046-2069 (ISSN)

Vol. 7 73 45968-45977

Driving Forces

Sustainable development

Areas of Advance

Nanoscience and Nanotechnology (2010-2017)

Transport

Production

Energy

Materials Science

Subject Categories

Chemical Engineering

DOI

10.1039/c7ra07533b

More information

Latest update

5/2/2018 1