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 45968-45977

Drivkrafter

Hållbar utveckling

Styrkeområden

Nanovetenskap och nanoteknik

Transport

Produktion

Energi

Materialvetenskap

Ämneskategorier

Kemiteknik

DOI

10.1039/c7ra07533b