Potentiodynamically Deposited Polyaniline on Stainless Steel
- 1 January 2002
- journal article
- Published by The Electrochemical Society in Journal of the Electrochemical Society
- Vol. 149 (11), A1393-A1399
- https://doi.org/10.1149/1.1509458
Abstract
Polyaniline (PANI) has been studied as an active material for electrochemical capacitors. Polymerization of aniline to PANI has been carried out potentiodynamically on a stainless steel (SS) substrate, instead of Pt-based substrates generally employed for this application. The PANI/SS electrodes have been evaluated by assembling symmetrical capacitors in NaClO4+HClO4NaClO4+HClO4 mixed electrolyte and subjecting them to galvanostatic charge/discharge cycles between 0 and 0.75 V. The effect of substrate has been assessed by comparing the capacitance of PANI/SS and PANI/Pt electrodes. The capacitance of PANI/SS electrode is higher than that of PANI/Pt electrode by several times. The effect of sweep rate of potentiodynamic deposition of PANI/SS on capacitance has been investigated. At a power density of 0.5 kW kg−1,0.5 kW kg−1, a capacitance value of 815Fg−1815Fg−1 of PANI is obtained for the deposition sweep rate of 200 mV s−1.200 mV s−1. Increase in thickness of PANI on the SS substrate results in an increase in capacitance of PANI. This value of capacitance is the highest ever reported for any electrochemical capacitor material. Thus, in addition to a favorable economic aspect involved in using SS instead of Pt or Pt-based substrate, the advantage of higher capacitance of PANI has also been achieved. © 2002 The Electrochemical Society. All rights reserved.Keywords
This publication has 30 references indexed in Scilit:
- Ultracapacitors: why, how, and where is the technologyJournal of Power Sources, 2000
- Cyclic voltammetric studies of the effects of time and temperature on the capacitance of electrochemically deposited nickel hydroxideJournal of Power Sources, 2000
- Conjugated Polymer-Based Chemical SensorsChemical Reviews, 2000
- Polythiophene-based supercapacitorsJournal of Power Sources, 1999
- Conducting polymers prepared by oxidative polymerization: polyanilineProgress in Polymer Science, 1998
- Materials for Electrochemical Capacitors: Theoretical and Experimental ConstraintsJournal of the Electrochemical Society, 1996
- High energy and high power density electrochemical capacitorsJournal of Power Sources, 1996
- Porous Nickel Oxide/Nickel Films for Electrochemical CapacitorsJournal of the Electrochemical Society, 1996
- A study of the electrochemical properties of conducting polymers for application in electrochemical capacitorsElectrochimica Acta, 1994
- Transition from “Supercapacitor” to “Battery” Behavior in Electrochemical Energy StorageJournal of the Electrochemical Society, 1991