Characterization of highly conducting lithium salt doped polyaniline films prepared from polymer solution

Kwang Sun Ryu, Bong Wong Moon, Jinsoo Joo, Soon Ho Chang

Research output: Contribution to journalArticlepeer-review

67 Citations (Scopus)

Abstract

We have developed a new method for preparing conducting polyaniline (Pani) films and investigated their chemical and physical properties by means of UV-Vis, FT-IR, EPR, XPS, and dc conductivity measurements. Conducting polyaniline films are prepared by casting from the solution of polyaniline with lithium salt. The free-standing films have relatively high dc conductivity without further treatment with HCl. The effects of lithium salts, such as LiBF4, LiPF6, and LiClO4, and their concentrations on dc conductivity are studied. The dc conductivity of Pani-LiBF4 film has been found to be better than those of Pani-LiPF6 and Pani-LiClO4 films. The dc conductivity of the systems increases with increasing lithium salt concentration in the range from 0.025 to 0.1 M, and exhibits a maximum value of ∼10-1 S/cm when 0.1 M LiBF4 is doped.

Original languageEnglish
Pages (from-to)9355-9360
Number of pages6
JournalPolymer
Volume42
Issue number23
DOIs
Publication statusPublished - 2001 Aug 20

Keywords

  • Infrared spectroscopy
  • Solution processing
  • UV-Vis absorption

ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry

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