Improved conducting states induced by an electrochemical charging process in polyaniline film doped with new dopants

Kwang Sun Ryu, Jae Hoon Jung, Jinsoo Joo, Soon H. Chang

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

We study the electrode characteristics of Li//polyaniline cells by using polyaniline films as positive electrodes. Two mechanisms for charging in a Li/polyaniline-Li salt cell are suggested; charge separation mechanism and intercalation mechanism. In the charge separation mechanism, the electrical conductivity, the peak area of N+ site in X-ray photoelectron spectroscopy (XPS) data, and the intensity of the electron spin resonance (ESR) signal increase as the concentration of unpaired electrons increases. We compare XPS and ESR signals, and dc conductivity for the polyaniline before and after charging. From the results of XPS experiments, the polyaniline samples after electrochemical treatment have more N+ state or more polarons, resulting in higher conductivity and larger ESR signal. The Li+ and counterions exist deep inside the Pani-LiPF6 and Pani-LiBF4 samples by charging process. Based on these results, we propose the charge separation mechanism in Li//polyaniline cells by using the polyaniline films as the positive electrodes.

Original languageEnglish
JournalJournal of the Electrochemical Society
Volume149
Issue number4
DOIs
Publication statusPublished - 2002 Apr 1

Fingerprint

Polyaniline
charging
Doping (additives)
conduction
polarization (charge separation)
electron paramagnetic resonance
photoelectron spectroscopy
Paramagnetic resonance
electrodes
X ray photoelectron spectroscopy
cells
Electrodes
conductivity
x rays
polarons
intercalation
Polarons
Intercalation
polyaniline
salts

ASJC Scopus subject areas

  • Electrochemistry
  • Surfaces, Coatings and Films
  • Surfaces and Interfaces

Cite this

Improved conducting states induced by an electrochemical charging process in polyaniline film doped with new dopants. / Ryu, Kwang Sun; Jung, Jae Hoon; Joo, Jinsoo; Chang, Soon H.

In: Journal of the Electrochemical Society, Vol. 149, No. 4, 01.04.2002.

Research output: Contribution to journalArticle

@article{a2f0c02646a843108f90d076e33d322d,
title = "Improved conducting states induced by an electrochemical charging process in polyaniline film doped with new dopants",
abstract = "We study the electrode characteristics of Li//polyaniline cells by using polyaniline films as positive electrodes. Two mechanisms for charging in a Li/polyaniline-Li salt cell are suggested; charge separation mechanism and intercalation mechanism. In the charge separation mechanism, the electrical conductivity, the peak area of N+ site in X-ray photoelectron spectroscopy (XPS) data, and the intensity of the electron spin resonance (ESR) signal increase as the concentration of unpaired electrons increases. We compare XPS and ESR signals, and dc conductivity for the polyaniline before and after charging. From the results of XPS experiments, the polyaniline samples after electrochemical treatment have more N+ state or more polarons, resulting in higher conductivity and larger ESR signal. The Li+ and counterions exist deep inside the Pani-LiPF6 and Pani-LiBF4 samples by charging process. Based on these results, we propose the charge separation mechanism in Li//polyaniline cells by using the polyaniline films as the positive electrodes.",
author = "Ryu, {Kwang Sun} and Jung, {Jae Hoon} and Jinsoo Joo and Chang, {Soon H.}",
year = "2002",
month = "4",
day = "1",
doi = "10.1149/1.1459712",
language = "English",
volume = "149",
journal = "Journal of the Electrochemical Society",
issn = "0013-4651",
publisher = "Electrochemical Society, Inc.",
number = "4",

}

TY - JOUR

T1 - Improved conducting states induced by an electrochemical charging process in polyaniline film doped with new dopants

AU - Ryu, Kwang Sun

AU - Jung, Jae Hoon

AU - Joo, Jinsoo

AU - Chang, Soon H.

PY - 2002/4/1

Y1 - 2002/4/1

N2 - We study the electrode characteristics of Li//polyaniline cells by using polyaniline films as positive electrodes. Two mechanisms for charging in a Li/polyaniline-Li salt cell are suggested; charge separation mechanism and intercalation mechanism. In the charge separation mechanism, the electrical conductivity, the peak area of N+ site in X-ray photoelectron spectroscopy (XPS) data, and the intensity of the electron spin resonance (ESR) signal increase as the concentration of unpaired electrons increases. We compare XPS and ESR signals, and dc conductivity for the polyaniline before and after charging. From the results of XPS experiments, the polyaniline samples after electrochemical treatment have more N+ state or more polarons, resulting in higher conductivity and larger ESR signal. The Li+ and counterions exist deep inside the Pani-LiPF6 and Pani-LiBF4 samples by charging process. Based on these results, we propose the charge separation mechanism in Li//polyaniline cells by using the polyaniline films as the positive electrodes.

AB - We study the electrode characteristics of Li//polyaniline cells by using polyaniline films as positive electrodes. Two mechanisms for charging in a Li/polyaniline-Li salt cell are suggested; charge separation mechanism and intercalation mechanism. In the charge separation mechanism, the electrical conductivity, the peak area of N+ site in X-ray photoelectron spectroscopy (XPS) data, and the intensity of the electron spin resonance (ESR) signal increase as the concentration of unpaired electrons increases. We compare XPS and ESR signals, and dc conductivity for the polyaniline before and after charging. From the results of XPS experiments, the polyaniline samples after electrochemical treatment have more N+ state or more polarons, resulting in higher conductivity and larger ESR signal. The Li+ and counterions exist deep inside the Pani-LiPF6 and Pani-LiBF4 samples by charging process. Based on these results, we propose the charge separation mechanism in Li//polyaniline cells by using the polyaniline films as the positive electrodes.

UR - http://www.scopus.com/inward/record.url?scp=0036530398&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0036530398&partnerID=8YFLogxK

U2 - 10.1149/1.1459712

DO - 10.1149/1.1459712

M3 - Article

AN - SCOPUS:0036530398

VL - 149

JO - Journal of the Electrochemical Society

JF - Journal of the Electrochemical Society

SN - 0013-4651

IS - 4

ER -