Title :
Graphene/Carbon Nanotube Films Prepared by Solution Casting for Electrochemical Energy Storage
Author :
Li, Juan-Juan ; Ma, Yan-Wen ; Jiang, Xu ; Feng, Xiao-Miao ; Fan, Qu-Li ; Huang, Wei
Author_Institution :
Inst. of Adv. Mater., Nanjing Univ. of Posts & Telecommun., Nanjing, China
Abstract :
Graphene oxide/carbon nanotube (GO/CNT) films with different CNT contents were prepared by a solution-casting method. The oxygen-containing groups on the GO/CNT films were removed by thermal annealing at 200°C and the corresponding hybrid graphene/CNT films were obtained. The graphene/CNT films have good mechanical and electrical properties as well as high stability in electrolyte due to the combination of the film-formation capability of graphenes and the excellent mechanical and electrical properties of CNTs. These graphene/CNT films could be directly used as a supercapacitor electrode without assistance of any binders and metal current collectors, demonstrating good electrochemical capacitance performance with the specific capacitance of 70-110 F/g at a low scan rate of 1 mV/s.
Keywords :
annealing; carbon nanotubes; electrical conductivity; electrochemical electrodes; electrolytes; energy storage; graphene; nanofabrication; supercapacitors; thermal analysis; thin films; C; electrical conductivity; electrical properties; electrochemical capacitance performance; electrochemical energy storage; electrolyte; graphene oxide-carbon nanotube film; hybrid graphene-CNT film; mechanical properties; solution-casting method; specific capacitance; supercapacitor electrode; temperature 200 degC; thermal annealing; Annealing; Capacitance; Electrodes; Films; Polymers; Supercapacitors; Carbon nanotubes (CNTs); film; graphenes; supercapacitors;
Journal_Title :
Nanotechnology, IEEE Transactions on
DOI :
10.1109/TNANO.2011.2158236
