Effect of porosity variation on the electrochemical behavior of vertically aligned multi-walled carbon nanotubes

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 230 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. © 2012 Elsevier B.V. All rights reserved.

Full Text

Duke Authors

Cited Authors

  • Raut, AS; Parker, CB; Stoner, BR; Glass, JT

Published Date

  • 2012

Published In

Volume / Issue

  • 19 / 1

Start / End Page

  • 138 - 141

PubMed ID

  • 22754296

International Standard Serial Number (ISSN)

  • 1388-2481

Digital Object Identifier (DOI)

  • 10.1016/j.elecom.2012.03.021

Citation Source

  • SciVal