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Ridge‐Valley Nanostructured Samaria‐Doped Ceria Interlayer for Thermally Stable Cathode Interface in Low‐Temperature Solid Oxide Fuel Cell
Author(s) -
Kim Hyong June,
Yu JinGeun,
Hong Soonwook,
Park Chan Hyung,
Kim YoungBeom,
An Jihwan
Publication year - 2017
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.201700465
Subject(s) - materials science , oxide , electrode , solid oxide fuel cell , cathode , layer (electronics) , doping , atmospheric temperature range , chemical engineering , degradation (telecommunications) , metal , composite material , optoelectronics , metallurgy , electrolyte , chemistry , electronic engineering , physics , meteorology , engineering
Agglomeration of the metal electrode decreases the performance of low‐temperature solid oxide fuel cells (LT‐SOFC) during operation at elevated temperatures. Here, we report a Pt electrode/ridge‐valley nanostructured samaria‐doped ceria (SDC) layer interface with extended lifetime. LT‐SOFCs with RF‐sputtered SDC interlayers with thicknesses in the range 65–260 nm show a >20 times lower degradation of performance as compared to cells without interlayer when operated at 450 °C (1.8% h −1 vs. 45% h −1 ). Micromorphological analysis reveals that the coarsening of the Pt electrode is significantly suppressed by the presence of the nanostructured SDC interlayer, possibly due to a stronger bonding between this layer and the Pt grains.