Effect of Elastic Network of Ceramic Fillers on Thermal Cycle Stability of a Solid Oxide Fuel Cell Stack
- Effect of Elastic Network of Ceramic Fillers on Thermal Cycle Stability of a Solid Oxide Fuel Cell Stack
- 이종호; 김형철; 김성문; 노태욱; 정화영; 임현엽; 정훈기; 손지원; 김혜령; 김병국; 제해준; 이재춘; 송휴섭; 이해원
- SOFC; Seal; elastic network
- Issue Date
- Advanced Energy Materials
- VOL 2, NO 4, 461-468
- 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 fi llers. 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 fi ller
network and corresponding redistribution of sealing glass.
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