By a News Reporter-Staff News Editor at Life Science Weekly -- A new study on Electrochemical Research is now available. According to news reporting originating from Karlsruhe, Germany, by NewsRx correspondents, research stated, "High-performance La0.6Sr0.4CoO3-delta SOFC thin-film cathodes (ASR(pol) = 9 m Omega. cm(2) at 600 degrees C) with a nanoscaled and nanoporous microstructure were investigated in detail by means of electrochemical impedances spectroscopy. The thin-film cathodes were derived by a wet chemical process and exhibit a film thickness of about 200 nm and an average grain and pore size in the sub 100 nm regime."
Our news editors obtained a quote from the research from the Karlsruhe Institute of Technology, "Systematic electrochemical impedance measurements were conducted on symmetrical cells across a broad range of temperatures (400 ... 600 degrees C) and oxygen atmospheres (pO(2) = 0.01 ... 0.5 atm), followed by a detailed data analysis. Five independent cathode processes were identified. Four of the processes are thermally activated, whereas one process at low frequencies exhibits a slight deactivation with increasing temperature. Furthermore, the three processes in the low and mid frequency range are oxygen partial pressure dependent, whereas the two high frequency processes remain unaffected by pO(2)-variations Based on these dependencies, an equivalent circuit model is presented and physical mechanisms such as gas and ionic diffusion, oxygen surface exchange and charge transfer are discussed as possible origins of the five loss processes."
According to the news editors, the research concluded: "In addition, the influence of H2O(g) and CO2 on the cathodic reaction in general and on the individual processes will be presented."
For more information on this research see: Detailed Electrochemical Study on Nanoscaled La0.6Sr0.4CoO3-delta SOFC Thin-Film Cathodes in Dry, Humid and CO2-Containing Atmospheres. Journal of the Electrochemical Society, 2013;160(11):F1197-F1206. Journal of the Electrochemical Society can be contacted at: Electrochemical Soc Inc, 65 South Main Street, Pennington, NJ 08534, USA. (The Electrochemical Society - ecsdl.org/; Journal of the Electrochemical Society - www.ecsdl.org/JES)
The news editors report that additional information may be obtained by contacting J. Hayd, Karlsruhe Inst Technol, DFG Center Funct Nanostruct CFN, D-76131 Karlsruhe, Germany (see also Electrochemical Research).
Keywords for this news article include: Europe, Germany, Karlsruhe, Chemistry, Chalcogens, Electrochemical Research
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