Microstructure modification in the electrodes to enhance performance of the anode-supported solid oxide fuel cell

Chun Yen Yeh, Tai Nan Lin, Hong Yi Kuo, Ming Wei Liao, Yu Ming Chen, Wei Xin Kao, Ruey Yi Lee, Sheng Wei Lee

研究成果: 書貢獻/報告類型會議論文篇章同行評審

1 引文 斯高帕斯(Scopus)

摘要

The electrochemical reaction efficiency for an SOFC is determined mainly at the interfaces between electrodes and electrolyte. The cell performance is influenced by a variety of parameters, such as the particle size, porosity, and microstructure. Microstructural tuning in the electrodes hence provides the performance elevation by increase the effective interfacial reaction sites. In this study, we use traditional materials to form the cells constructed with NiO-YSZ (Yttria stabilized zirconia) as anode supported substrate, YSZ as electrolyte, and YSZ-La0.8Sr0.2MnO3 (LSM) | LSM as functional and cathode layers. In the anode, two different cermet structures with powder refinement approach have been adopted to increase the oxygen exchange rate. On the other hand, introducing LSM-YSZ composite as functional layer is essential for the limited ion conductivity of LSM, which will be beneficial for power output. The cell performance elevation and microstructure analysis allows us to verify functions of sub-micron cermet at anode during the cell operation. The composition effect in cathode may also favor the enhancement. Three typical cells were prepared, and the maximum power density is 280 mWcm-2 for cell with original materials used. The power density increases to 395 mWcm-2 for the cell with cermet particle refinement. It further improves to 520 mWcm-2 for cell with cathode functional layer modification. The small grain size of several tens nano-meter structure in the interfaces exists in a local region near interfaces. It is evidenced that the nano-sized electrode materials which may be attributed to the high current loading can increase the triple phase boundary (TPB) density.

原文???core.languages.en_GB???
主出版物標題Ceramic Engineering and Science Proceedings
編輯Jerry LaSalvia, Jonathan Salem, Mihails Kusnezoff, Dietmar Koch, Narottam Bansal, Peter Mechnich, Palani Balaya, Zhengyi Fu, Tatsuki Ohji
發行者American Ceramic Society
頁面113-121
頁數9
版本2
ISBN(電子)9781119519645, 9781119543268, 9781119543305
出版狀態已出版 - 2019
事件42nd International Conference on Advanced Ceramics and Composites, ICACC 2018 - Daytona Beach, United States
持續時間: 21 1月 201826 1月 2018

出版系列

名字Ceramic Engineering and Science Proceedings
號碼2
39
ISSN(列印)0196-6219

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???event.eventtypes.event.conference???42nd International Conference on Advanced Ceramics and Composites, ICACC 2018
國家/地區United States
城市Daytona Beach
期間21/01/1826/01/18

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