On the use of multichannel data acquisition of impedance spectra
authors Abrantes, JCC; Perez-Coll, D; Nunez, P; Frade, JR
nationality International
journal IONICS
abstract Impedance spectroscopy is a powerful technique for electrical and electrochemical characterisation of ionic conductors and other electroceramics. Thus, one might tempted to use multi-channel data acquisition to allow the utilisation of expensive LCR meters for simultaneous measurements. This work shows results for YSZ and strontium titanate ceramics, obtained with a multi-channel data acquisition system, to demonstrate the limitations of this approach and the applicability of some corrections. Impedance spectra are affected under multi-channel conditions, mainly in the high frequency contributions, and this is approximately described by a stray capacitance. The bulk contribution of the spectra is most affected. Contributions of internal interfaces (e.g. grain boundaries) are relatively well characterised, mainly after the proposed corrections. The characterisation of electrode processes is not affected.
publisher INST IONICS
issn 0947-7047
year published 2003
volume 9
issue 5-6
beginning page 370
ending page 374
digital object identifier (doi) 10.1007/BF02376588
web of science category Chemistry, Physical; Electrochemistry; Physics, Condensed Matter
subject category Chemistry; Electrochemistry; Physics
unique article identifier WOS:000220394600009
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journal impact factor 2.394
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