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Effect of Elastic Network of Ceramic Fillers on Thermal Cycle Stability of a Solid Oxide Fuel Cell Stack
Author(s) -
Lee JongHo,
Kim Hyoungchul,
Kim Sung Moon,
Noh TaeWook,
Jung HwaYoung,
Lim HyunYup,
Jung HunGi,
Son JiWon,
Kim HaeRyoung,
Kim ByungKook,
Je HaeJune,
Lee JaeChun,
Song Huesup,
Lee HaeWeon
Publication year - 2012
Publication title -
advanced energy materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.08
H-Index - 220
eISSN - 1614-6840
pISSN - 1614-6832
DOI - 10.1002/aenm.201100355
Subject(s) - materials science , composite material , ceramic , gasket , elastomer , solid oxide fuel cell , stack (abstract data type) , seal (emblem) , oxide , thermal , composite number , anode , metallurgy , art , visual arts , chemistry , physics , electrode , meteorology , computer science , programming language
Glass‐based seals for planar solid‐oxide fuel‐cell (SOFC) stacks are open to uncontrolled deformation and mechanical damages, limiting both sealing integrity and stack reliability, particularly in thermal cycle operations. If the glass‐based seals work like an elastomer‐based compressive seal, SOFC stacks may survive unprecedented numbers of thermal cycles. A novel composite sealing gasket is successfully developed to mimic the unique features of the elastomer‐based compressive seal by controlling the composition and packing behavior of binary ceramic fillers. A single‐cell SOFC stack undergoes more than 100 thermal cycles with little performance loss, during which the sealing integrity is lost/recovered repeatedly upon cooling and reheating, corresponding to unloading/loading of the elastomer‐based compressive seal. The thermal‐cycle responses of the SOFC stack are explained in sequence by the concurrent events of elastic deformation/recovery of ceramic filler network and corresponding redistribution of sealing glass.