Title :
Preparation and characterization of electrochemical supercapacitors based on SWNT/PPy nanocomposites
Author :
Oh, Jiyoung ; Kozlov, Mikhail E. ; Novitski, David M. ; Baughman, Ray H.
Author_Institution :
Alan G. MacDiarmid NanoTech Inst., Univ. of Texas at Dallas, Richardson, TX, USA
Abstract :
We report preparation and characterization of novel nanocomposite electrodes consisting of single-walled carbon nanotubes (SWNT) and polypyrrole (PPy) for electrochemical supercapacitors. The electrodes in the form of papers and fibers were prepared by i) vacuum filtration of SWNT/PPy methanol dispersion and ii) wet-spinning of SWNT/PPy aqueous dispersion, respectively. Electrochemical properties of prepared nanocomposites were investigated using cyclic voltammetry method in aqueous NaCl and NaPF6 electrolytes. The capacitance of the SWNT/PPy nanocomposite papers was about 5 times higher than that of pristine SWNT paper. The capacitance of SWNT/PPy fibers reached record 200 F/g values. Prospective applications of prepared materials range from supercapacitors to electrodes for batteries and electromechanical actuators.
Keywords :
carbon nanotubes; electrochemical electrodes; electrolytes; electromechanical actuators; filtration; nanocomposites; secondary cells; sodium compounds; supercapacitors; voltammetry (chemical analysis); C; NaCl; NaPF6; SWNT/PPy nanocomposites; aqueous dispersion; aqueous electrolytes; batteries; cyclic voltammetry; electrochemical properties; electrochemical supercapacitors; electromechanical actuators; methanol dispersion; nanocomposite electrodes; polypyrrole; single-walled carbon nanotubes; vacuum filtration; wet spinning;
Conference_Titel :
Nanotechnology (IEEE-NANO), 2010 10th IEEE Conference on
Conference_Location :
Seoul
Print_ISBN :
978-1-4244-7033-4
Electronic_ISBN :
1944-9399
DOI :
10.1109/NANO.2010.5697791
