LSM Microelectrodes: Kinetics and Surface Composition. Issue 10 (1st January 2015)

• Record Type: Journal Article
• Authors: Hansen, Karin Vels; Norrman, Kion; Jacobsen, Torben; Wu, Yuehua; Mogensen, Mogens Bjerg
• Is Part Of: Journal of the Electrochemical Society. Volume 162:Issue 10(2015)
• Page Start: F1165
• Page End: F1174
• Publication Date: 2015-01-01
• Subjects: Impedance spectroscopy -- impurities -- LSM -- Microelectrodes -- segregation -- TOF-SIMS; Electrochemistry -- Periodicals; 541.3705
• DOI: 10.1149/2.0361510jes
• Languages: English
• ISSNs: 0013-4651

Abstract

Abstract : Lanthanum strontium manganite microelectrodes with the nominal composition of (La0.75 Sr0.25 )0.95 MnO3 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.