Insulator-metal transition of Li salts doped polyaniline

Jinsoo Joo, J. H. Jung, B. H. Kim, B. W. Moon, S. H. Chang, K. S. Ryu

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The results of dc conductivity (σdc), X-ray photoelectron spectroscopy (XPS), and electron paramagnetic resonance (EPR) for Li salts (LiPF6, LiBF4) doped polyaniline (PAN) are reported. Temperature (T) dependence of σdc of LiPF6 or LiBF4 doped PAN samples shows lnσdc ∝ T-1/2 arising from a quasi-one-dimensional (1D) variable range hopping (VRH) model. As molar concentration increases, the insulator-metal transition is observed in the results of σdc and the density of states obtained from EPR experiments. The doping levels of the systems are obtained from XPS nitrogen (N) 1s peak analysis. The doping process and the insulator-metal transition of Li salts doped PAN samples are compared with those of HCl doped PAN samples.

Original languageEnglish
Pages (from-to)461-462
Number of pages2
JournalSynthetic Metals
Issue number1-3
Publication statusPublished - 2001 Mar 15



  • Batteries
  • Conductivity
  • Electron spin resonance
  • Metal-insulator phase transitions
  • Polyaniline and derivatives
  • Transport measurements

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Materials Chemistry
  • Polymers and Plastics

Cite this

Joo, J., Jung, J. H., Kim, B. H., Moon, B. W., Chang, S. H., & Ryu, K. S. (2001). Insulator-metal transition of Li salts doped polyaniline. Synthetic Metals, 119(1-3), 461-462.