title: Effect of porosity variation on the electrochemical behavior of vertically aligned multi-walled carbon nanotubes.
abstract: Electrochemical charge storage characteristics of vertically aligned multi-walled carbon nanotubes (MWCNTs) as a function of varying diameter and spacing are reported. It was observed that the specific capacitance of the MWCNTs increased as both diameter and inter-tube spacing decreased. The MWCNT films with 229 nm inter-MWCNT spacing exhibited specific capacitance of 228 F/g versus 70 F/g for 506 nm spacing, when tested in a non-aqueous electrolyte. Further, a trend in specific capacitance versus pore size is proposed. Coupled with previously reported trends observed in the sub-10 nm pore size regime, this is expected to offer better understanding of electrochemical behavior of porous carbon materials over a wide range of pore sizes.
authors: Department of Electrical and Computer Engineering, Duke University, Durham, NC 27708, USA.
authors: Akshay S
authors: AS
authors: Raut
authors: Charles B
authors: CB
authors: Parker
authors: Brian R
authors: BR
authors: Stoner
authors: Jeffrey T
authors: JT
authors: Glass