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Wednesday, March 27

Novel Complex Perovskite-Structured Proton-Conducting
Ceramics for SOFC Electrolytes and H2 Separation

Siwei Wang, University of South Carolina, Columbia
Materials Science and Technology Division Seminar
11:00 AM — 12:00 PM, Chemical and Material Sciences Building (4100), Room J-302
Contact: Ho Nyung Lee (hnlee@ornl.gov), 865.574.9782

Abstract

Proton-conducting ceramics can be applied in electrolytes in solid oxide fuel cells, hydrogen separation membranes, high-temperature hydrogen sensors, and steam electrolysers. For most of the practical applications, both high proton conductivity and chemical stability are desirable. However, the state-of-the-art proton-conducting ceramics are facing great challenges in simultaneously fulfilling conductivity and stability requirements for practical applications. Consequently, understanding the properties for the proton-conducting ceramics and developing novel materials that possess both high proton conductivity and enhanced chemical stability have both scientific and practical significance. The objective of this study is to design and develop novel proton-conducting ceramics by investigating the structure-property relationships of the complex perovskite Ba3Ca1.18Nb1.82-xYxO9-d to determine its potential for use in proton-conducting ceramics with improved proton conductivity and enhanced chemical stability.