报告题目：Protonic ceramic fuel cells with fuel flexibility

报告人：Wonyoung Lee 副教授，韩国成均馆大学

报告时间：2023年11月5日（周日）15:00-16:00

报告地点：华南理工大学(大学城校区) 环境与能源学院B5-102会议室

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报告摘要：

Among various types of solid oxide electrochemical cells, protonic ceramic fuel cells (PCFCs) have been expected to reduce the operating temperature below 600 °C with their significantly high ionic conductivity and activation energy. However, the low chemical and physical stabilities of proton conducting oxides during fabrication processes, primarily due to the high mobility and volatility of Barium (Ba), limiting their utilization and application. Here, we present the chemically and physically stable BaZr_0.4Ce_0.40Y_0.1Yb_0.1O₃ (BZCYYb) electrolyte with the desired stoichiometry and the average grain size of ~10 µm by controlling the chemical potential of the A-site cation, Ba, near the BZCYYb electrolyte surface during the sintering process. A stoichiometric BZCYYb-based PCFC in an anode-supported configuration exhibits 1.01 W/cm²2    with an extremely low ohmic resistance of ~0.082 ohm·cm² 2 at 550 °C, respectively, surpassing the values of all previously reported PCFCs without complicated engineering in materials and structures of other cell components. Furthermore, the stoichiometric BZCYYb-based PCFCs demonstrate significantly high performance and stability with various fuels such as methane and ammonia.

报告人简介：

Wonyoung Lee received his B.S. degree in Department of Mechanical and Aerospace Engineering at Seoul National University, Seoul, Korea, in 2004, and his M.S. and Ph.D. degrees in Mechanical Engineering at Stanford University, Stanford, CA, USA, in 2006 and 2010, respectively. He is currently an Associate Professor in School of Mechanical Engineering, Sungkyunkwan University, Suwon, Korea. His current research interests include design, fabrication, characterization, and modeling of energy storage and conversion devices for rational design of materials and structures with unique functionalities.