期刊
SOLID STATE IONICS
卷 268, 期 -, 页码 82-93出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.ssi.2014.10.002
关键词
LSM; Microelectrode; Impedance spectroscopy; Finite element; Degradation; Temperature gradient
资金
- Austrian Science Fund (FWF) [P21960-N17, W1243-N16]
- Austrian Science Fund (FWF) [P21960, W1243] Funding Source: Austrian Science Fund (FWF)
- Austrian Science Fund (FWF) [P 21960] Funding Source: researchfish
Microelectrodes on solid electrolytes, contacted by current-collecting tips, have become increasingly important for analyzing electrochemical properties of electrode materials in solid state ionics. Samples are usually asymmetrically heated from the bottom side. It is shown experimentally, e.g. by thermovoltage measurements, impedance spectroscopy and infrared camera pictures, as well as by finite element modeling that substantial temperature gradients may arise in these experiments. Consequences in terms of data analysis are discussed and ways to alleviate the problem are described. For a complete avoidance of the temperature inhomogeneity problem, a novel symmetrically heated micro-contact set-up was built. (C) 2014 Elsevier B.V. All rights reserved.
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