Electrical Impedance Studies of Acid-Form NAFION Membranes

Abstract

Electrical conductivity/dielectric relaxation studies of acid form Nafion-1 17 have been carried out at frequencies from 10 to 10(exp 8) Hz. By direct measurement, it is shown that when standard two terminal measurements are made across the thickness of a 0.18 mm film, it is necessary to use frequencies in excess of 10(exp 7) Hz in order to observe the bulk conductivity of the sample. As a consequence, previous reports of a power law dependence for the electrical conductivity are not associated with the bulk electrical conductivity but rather are due to electrode effects and space charge. As confirmation, it is shown that by changing the geometry of the electrodes, the low frequency electrical response of the material is significantly changed. Nafion, Complex impedance, Electrical conductivity ion-exchange membrane, Dielectric relaxation.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
May 01, 1994
Accession Number
ADA279271

Entities

People

  • J.P. Calame
  • John J. Fontanella
  • M. C. Wintersgill
  • M. G. Mclin
  • S. G. Greenbaum

Organizations

  • United States Naval Academy

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Barometric Pressure
  • Conductivity
  • Electrical Conductivity
  • Electrical Impedance
  • Electrodes
  • Films
  • Frequency
  • Geometry
  • Impedance
  • Ion Exchange
  • Materials
  • Measurement
  • Measuring Instruments
  • Membranes
  • Space Charge
  • Standards
  • United States Naval Academy

Fields of Study

  • Materials science

Readers

  • Materials Science and Engineering.
  • Microwave Engineering.

Technology Areas

  • Space
  • Space - Hall-Effect Thruster