Effect of La2Zr2O7 on Interfacial Resistance in Solid Oxide Fuel Cells
نویسندگان
چکیده
The impact of La2Zr2O7 !LZO" on interfacial resistance !Rp" at the La0.78Sr0.20MnO3−!/yttria-stabilized zirconia interface was studied upon isothermal sintering at 1200°C for 2–25 h. Quantification of triple phase boundary length was performed by applying focused ion beam/scanning electron microscopy !FIB/SEM" serial-sectioning techniques and classical stereology. Electrochemical impedance spectroscopy was used to characterize the Rp. The effect of LZO formation on microstructural models for Rp was analyzed with respect to previous works that did not include this effect. LZO formation modifies the TPB length, rapidly increases Rp, and needs to be controlled in analytical microstructural Rp models. © 2010 The Electrochemical Society. #DOI: 10.1149/1.3484092$ All rights reserved.
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