LSM Microelectrodes: Kinetics and Surface Composition

Karin Vels Hansen, Kion Norrman, Torben Jacobsen, Yuehua Wu, Mogens Bjerg Mogensen

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Abstract

Lanthanum strontium manganite microelectrodes with the nominal composition of (La0.75Sr0.25)0.95MnO3 and a thickness of ca 500 nm was electrochemically characterized in situ at temperatures from 660 to 850◦C using a controlled atmosphere high temperature scanning probe microscope. Impedance spectroscopy and cyclic voltammetry were performed on electrodes with diameters of 20–100 μm in oxygen, air and nitrogen both at open circuit voltage and at anodic and cathodic polarization. In situ conductance mapping, ex situ surface analysis by time-of-flight secondary ion mass spectrometry, and scanning electron microscopy were performed to observe electrical, chemical and structural changes on the microelectrodes. © 2015 The Electrochemical Society.
Original languageEnglish
JournalJournal of The Electrochemical Society
Volume162
Issue number10
Pages (from-to)F1165-F1174
ISSN0013-4651
DOIs
Publication statusPublished - 2015

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