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Surface modification of yttria-stabilized zirconia electrolyte by atomic layer deposition
Cheng-Chieh Chao1, Young Beom Kim, Fritz B Prinz
1Department of Mechanical Engineering, Department of Materials Science and Engineering, Stanford University, Stanford, California 94305, USA. ccchao1@stanford.edu.
Abstract:
Yttria-stabilized zirconia (YSZ) electrolyte membranes were surface modified by adding a 1 nm thin, high-yttria concentration YSZ film with the help of atomic layer deposition. The addition of the 1 nm film led to an increase of the maximum power density of a low-temperature solid oxide fuel cell (LT-SOFC) by a factor of 1.50 at 400 degrees C. The enhanced performance can be attributed to an increased oxide ion incorporation rate on the surface of the modified electrolyte.
