TITLE

Note: Electrode polarization of Galinstan electrodes for liquid impedance spectroscopy

AUTHOR(S)
Mellor, Brett L.; Kellis, Nathan A.; Mazzeo, Brian A.
PUB. DATE
April 2011
SOURCE
Review of Scientific Instruments;Apr2011, Vol. 82 Issue 4, p046110
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Electrode polarization is a significant obstacle in the impedance measurements of ionic liquids. An atomically smooth electrode surface could potentially reduce unwanted impedance contributions from electrode polarization. Liquid metal electrodes were formed by adhering Galinstan to acrylic plates in a parallel-plate capacitor arrangement. Electrode polarization was compared to a similar cell with stainless steel electrodes. The impedance of salt and protein solutions (β-lactoglobulin) was measured from 40 Hz to 110 MHz. Because of oxide layer formation, the performance of the Galinstan electrode is significantly different than the theoretical ideal.
ACCESSION #
60283500

 

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