Electrical properties of metallic electrodes
- 1 March 1990
- journal article
- research article
- Published by Springer Science and Business Media LLC in Medical & Biological Engineering & Computing
- Vol. 28 (2), 182-186
- https://doi.org/10.1007/bf02441775
Abstract
The series equivalent resistance R and capacitance C of metal/saline electrode/electrolyte interfaces were measured as a function of frequency (100 Hz–20k Hz) and current density (0·25 to 1000 A m−2) for eight typical electrode metals. For each of the metals tested, R decreased and C increased as the current density was increased above a critical value (with the exception of silver and MP35N at frequencies above 1 kHz for which R increased and C decreased slightly). With the exception of copper, the current density linearity limit (for 10 per cent decrease in R or 10 per cent increase in C) increased with increasing frequency and, in most cases, the current density linearity limit for 10 per cent increase in C was slightly less than that for 10 per cent decrease in R. Among the metals tested, copper and aluminium had the lowest current carrying capability and rhodium had the highest current-carrying capability. The current carrying capabilities of 316 SS, platinum, silver and MP35N, were intermediate and similar. With increasing current density, an increase in the electrode/electrolyte capacitance was the most sensitive indicator of the current-carrying linearity limit.Keywords
This publication has 11 references indexed in Scilit:
- The Rectification Properties of an Electrode-Electrolyte Interface Operated at High Sinusoidal Current DensityIEEE Transactions on Biomedical Engineering, 1987
- Linear and nonlinear properties of platinum electrode polarisation. Part 1: frequency dependence at very low frequenciesMedical & Biological Engineering & Computing, 1982
- Characteristics of the Metal-Tissue Interface of Stimulation ElectrodesIEEE Transactions on Biomedical Engineering, 1976
- Measurement of Electrolytic Resistivity and Electrode-Electrolyte Impedance with a Variable-Length Conductivity CellInstrumentation Science & Technology, 1972
- The impedance of stainless-steel electrodesMedical & Biological Engineering & Computing, 1971
- Nonlinearity of Cardiac Pacemaker ElectrodesIEEE Transactions on Biomedical Engineering, 1969
- ELECTRODE POLARIZATION IMPEDANCE AND MEASUREMENTS IN BIOLOGICAL MATERIALS*Annals of the New York Academy of Sciences, 1968
- An analysis of electrical properties of metal electrodesMedical & Biological Engineering & Computing, 1964
- XXXIII.The theory of electrolytic polarizationThe London, Edinburgh, and Dublin Philosophical Magazine and Journal of Science, 1932
- Ueber das Verhalten sogenannter unpolarisirbarer Elektroden gegen WechselstromAnnalen der Physik, 1899