Impedance spectroscopy of a single-walled carbon nanotubes/TlH 2PO4 ferroelectrics composite system

Se Hun Kim, J. J. Kweon, J. H. Han, Kwang Sei Lee, Cheol Eui Lee

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


The electrical properties of single-walled carbon nanotubes (SWNTs)/TlH2PO4 composites have been studied, a metallic transition being observed around a SWNTs concentration of 0.2 wt.% and investigated by means of impedance spectroscopy. This work represents the first study of its kind to show that nanoparticles may be employed as valued additives that are compatible with the solid acids, providing for increased electrical conductivity of fuel-cell electrolytes. A two orders of magnitude increase in the surface capacitance was observed in the composite, opening up a possibility of new solid acid electrolytes for fuel cells and composite electrolytes serving as a supercapacitor by itself.

Original languageEnglish
Pages (from-to)636-638
Number of pages3
JournalCurrent Applied Physics
Issue number3
Publication statusPublished - 2011 May

Bibliographical note

Funding Information:
This work was supported by the National Research Foundation of Korea (NRL Program R0A-2008-000-20066-0 and M2009-0078083). The measurements at the Korean Basic Science Institute (KBSI) are acknowledged.

Copyright 2011 Elsevier B.V., All rights reserved.


  • Electrical transport properties
  • Metal-based composites
  • Single-walled carbon nanotubes
  • Solid acids

ASJC Scopus subject areas

  • General Materials Science
  • General Physics and Astronomy


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