Electrochemical performance and long-term durability of a 200 W-class solid oxide regenerative fuel cell stack
作者： Jongsup Hong , Hyo-Jin Kim , Sun-Young Park , Jin-Ho Lee , Su-Byung Park
DOI: 10.1016/J.IJHYDENE.2014.06.114
关键词: Materials science 、 High-temperature electrolysis 、 Yttria-stabilized zirconia 、 Electrolysis of water 、 Composite material 、 Electrolytic cell 、 Regenerative fuel cell 、 Stack (abstract data type) 、 Electrode 、 Solid oxide fuel cell
摘要: Abstract The electrochemical performance and durability of a 200 W-class solid oxide regenerative fuel cell (SORFC) stack are investigated for cyclic mode-changing long-term operation. Three unit cells (10 cm × 10 cm), each based on Ni – yttria-stabilized zirconia (YSZ) electrode, scandia-stabilized (ScSZ) electrolyte Sr-doped LaCoO3 (LSC) gadolinia-doped ceria (GDC) air used the development. Delamination electrode is suppressed by using mixed ionic- electronic-conducting with no oxygen excess non-stoichiometry, gas leakage minimized novel glass-ceramic composite sealants. Excellent achieved in single level minimizing ohmic polarizations, three-cell successfully configured without major loss associated electrical contacts, supply or sealing. Stable operation confirmed at thermal neutral voltage 1000 h electrolysis (SOEC) mode, periodic change mode between (SOFC) SOEC found to accelerate degradation. effect stability SORFC stacks discussed detail observations from post-mortem microstructural analysis.
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