Electrochemical and physical characterization of lithium ionic salt doped polyaniline as a polymer electrode of lithium secondary battery

Kwang Sun Ryu, Kwang Man Kim, Seong Gu Kang, Gye Joong Lee, Jinsoo Joo, Soon Ho Chang

Research output: Contribution to journalArticle

90 Citations (Scopus)

Abstract

Polyaniline films doped with lithium ionic salts such as LiPF6 and LiBF4 were prepared by using the electrolyte solution mixture of ethylene carbonate and dimethyl carbonate. The doping level of the polyaniline films was confirmed by X-ray photoelectron spectroscopy and dc conductivity experiments. A doping mechanism of lithium ion through the interaction with a nitrogen at imine site is proposed. Electrochemical cells of Li//polyaniline-LiPF6 or Li//polyaniline-LiBF4 were assembled to investigate electrical capacity and its trends over the repeated charge/discharge cycles. The capacity of Li//polyaniline cell was increased and then saturated over 15 cycles. However, it did not reach the half of theoretical capacity of polyaniline material. The mechanism of electrochemical reaction during charge/discharge process of Li//polyaniline cell is presented.

Original languageEnglish
Pages (from-to)213-217
Number of pages5
JournalSynthetic Metals
Volume110
Issue number3
DOIs
Publication statusPublished - 2000 Apr 17

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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