Please use this identifier to cite or link to this item: https://doi.org/10.1007/BF00266125
Title: Thin film polyaniline-polyaniline electrochemical cells
Authors: Lee, J.Y. 
Ong, L.H. 
Chuah, G.K. 
Issue Date: Oct-1993
Citation: Lee, J.Y., Ong, L.H., Chuah, G.K. (1993-10). Thin film polyaniline-polyaniline electrochemical cells. Journal of Applied Electrochemistry 23 (10) : 1031-1038. ScholarBank@NUS Repository. https://doi.org/10.1007/BF00266125
Abstract: Electrodeposited polyaniline (PANT) in the emeraldine oxidation state was used as the electrodes of open rechargeable cells containing 1 m HClO4 as the electrolyte. The cells could be charged at very high hourly rates to 85% of the redox charge in the leucoemeraldine-emeraldine transition of the polymer. Contrary to normal behaviour of rechargeable cells, the coulombic efficiency improved with increasing rates of charge injection and withdrawal. This is attributed to less charge being dissipated by self-discharge at high rates of discharge. The poor charge retention was caused by reactions between the charged electrodes and their environment. The decrease in cell voltage on standing may also be induced by internal redox reactions of PANT of different oxidation states present at the electrodes as a result of incomplete oxidation or reduction during cell operation. Ultraviolet (u.v.) spectroscopy of the charged electrodes identified mostly protonated leucoemeraldine at the negative electrode and pernigraniline at the positive electrode. The irreversibility in the oxidation from the emeraldine state to the pernigraniline state accounts mostly for the degeneration of cell performance after prolonged cycling. © 1993 Chapman & Hall.
Source Title: Journal of Applied Electrochemistry
URI: http://scholarbank.nus.edu.sg/handle/10635/91775
ISSN: 0021891X
DOI: 10.1007/BF00266125
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.

SCOPUSTM   
Citations

15
checked on Dec 6, 2018

WEB OF SCIENCETM
Citations

16
checked on Nov 27, 2018

Page view(s)

83
checked on Dec 7, 2018

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.