D.C. voltammetry of ionic liquid-based capacitors : Effects of Faradaic reactions, electrolyte resistance and voltage scan speed investigated using an electrode of carbon nanotubes in EMIM-EtSO4

D.C. voltammetry of ionic liquid-based capacitors : Effects of Faradaic reactions, electrolyte resistance and voltage scan speed investigated using an electrode of carbon nanotubes in EMIM-EtSO4

Carbon nanotube (CNT) electrodes in combination with ionic liquid (IL) electrolytes are potentially important for energy storage systems. We report electrochemical investigation of such a system involving a paper-electrode of multi-wall CNT (MWCNT) in the IL of 1-ethyl-3-methyl imidazolium ethylsulf...

Full description

Saved in:
Bibliographic Details
Published in:Talanta (Oxford) Vol. 78; no. 3; pp. 1056 - 1062
Main Authors: ZHENG, J. P, PETTIT, C. M, GOONETILLEKE, P. C, ZENGER, G. M, ROY, D
Format: Journal Article
Language:English
Published: Amsterdam Elsevier 15-05-2009
Subjects:
Analytical chemistry
Chemistry
Electric Capacitance
Electrochemical methods
Electrochemical Techniques - instrumentation
Electrochemical Techniques - methods
Electrodes
Electrolytes
Exact sciences and technology
Ionic Liquids
Nanotubes, Carbon
Cyclic voltammetry
Carbon nanotube
Double layer capacitance
Electrochemical method
Equivalent circuit
Carbon electrode
Carbon nanotubes
Capacitance
Artefact
Capacitor
Double layers
Ionic liquid
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Carbon nanotube (CNT) electrodes in combination with ionic liquid (IL) electrolytes are potentially important for energy storage systems. We report electrochemical investigation of such a system involving a paper-electrode of multi-wall CNT (MWCNT) in the IL of 1-ethyl-3-methyl imidazolium ethylsulfate (EMIM-EtSO(4)). Our study concentrates on the analytical aspects of cyclic voltammetry (CV) to probe the double layer capacitance of these relatively unconventional systems (that involve rather large charge-discharge time constants). Both theoretical and experimental aspects of CV for such systems are discussed, focusing in particular, on the effects of Faradaic side-reactions, electrolyte resistance and voltage scan speeds. The results are analyzed using an electrode equivalent circuit (EEC) model, demonstrating a method to account for the typical artifacts expected in CV of CNT-IL interfaces.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:0039-9140
1873-3573
DOI:10.1016/j.talanta.2009.01.014