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Plasma‐Sprayed YSZ/Ni–LSGM–LSCo Intermediate‐Temperature Solid Oxide Fuel Cells
Author(s) -
Lo ChihHung,
Tsai ChunHuang,
Hwang Changsing
Publication year - 2009
Publication title -
international journal of applied ceramic technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.4
H-Index - 57
eISSN - 1744-7402
pISSN - 1546-542X
DOI - 10.1111/j.1744-7402.2008.02294.x
Subject(s) - materials science , yttria stabilized zirconia , anode , cathode , cobaltite , microstructure , solid oxide fuel cell , electrolyte , oxide , hydrogen , analytical chemistry (journal) , chemical engineering , metallurgy , electrode , ceramic , cubic zirconia , chemistry , organic chemistry , chromatography , engineering
An intermediate‐temperature solid oxide fuel cell based on YSZ/Ni anode, LSGM electrolyte, and lanthanum strontium cobaltite (LSCo) cathode coatings were sequentially deposited onto a porous Ni substrate by atmospheric plasma spraying (APS). The spray parameters for each coating are well selected. The sprayed YSZ/Ni anode having a novel nanostructure with advantageous triple phase boundaries after hydrogen reduction shows a good electrocatalytic activity for hydrogen oxidation reactions. Dense LSGM with a thickness of about 60 μm and a conductivity of about 0.053 S/cm at 800°C shows a good gas tightness and gives an open circuit voltage value >1 V. The sprayed LSCo cathode with a thickness of 10–20 μm and a porosity of about 25% keeps the right phase structure and good porous network microstructure for conducting electrons and negative oxygen ions after plasma spraying and heat treatment at about 1000°C for 1 h. A maximum output power density of the sprayed cell achieved 365 mW/cm 2 at 800°C, 250 mW/cm 2 at 750°C, and 180 mW/cm 2 at 700°C. The results show that the use of APS cell allowed the reduction of the operating temperature to below 750°C.