Study on the performance and the reliability of nanostructured anodes for low-temperature solid oxide fuel cells (LT-SOFC) = 저온작동 고체산화물 연료전지를 위한 나노구조 연료극의 성능 및 신뢰성 연구

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Solid oxide fuel cells (SOFCs) are promising next-generation power sources. SOFCs have higher efficiency than other competing energy conversion technologies because they directly convert chemical energy of fuel into electrical energy by electrochemical reactions. However, the high operating temperature of SOFCs (700~800°C) has limited the development and deployment of this technology because it induces fast degradation and poor reliability. Therefore, lowering the operating temperature is a major issue in SOFC research, and it has been actively studied over the past decade. This study investigated the performance and reliability of nanostructured anode for low-temperature operating SOFCs (LT-SOFCs). The influence of the nanostructured anode on the operation of the SOFC is evaluated through electrochemical analysis. The correlation between microstructure and performance is observed and based on the results, a novel structure of the anode is proposed. Although the amount of Ni catalyst was significantly reduced to improve the reliability, the electrochemical performance was not compromised by nanostructured, and the improved reliability was proved by stress analysis. It is observed that the newly designed anode significantly increased not only the electrochemical performance but also the mechanical stability. This study provides insights to the stability issue that has been obstacles in the commercialization of nanostructured SOFCs. This study is focused on the anode of SOFC, however, it is expected that the methodology can be extended to other components as well.
Advisors
Han, Seung Minresearcher한승민researcher
Description
한국과학기술원 :신소재공학과,
Publisher
한국과학기술원
Issue Date
2019
Identifier
325007
Language
eng
Description

학위논문(박사) - 한국과학기술원 : 신소재공학과, 2019.2,[ⅶ, 84 p. :]

Keywords

SOFC▼aanode▼ananostructure▼aperformance▼astability; 고체산화물연료전지▼a연료극▼a나노구조▼a성능▼a신뢰성

URI
http://hdl.handle.net/10203/265033
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=842157&flag=dissertation
Appears in Collection
MS-Theses_Ph.D.(박사논문)
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