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La 2 Mo 2 O 9 ‐Based Electrolyte: Ion Conductivity and Anode‐Supported Cell under Single Chamber Conditions
Author(s) -
Lo JenChieh,
Tsai DahShyang,
Chen YuChen,
Le MinhVien,
Chung WenHung,
Liu FengJiin
Publication year - 2011
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2010.04168.x
Subject(s) - anode , electrolyte , materials science , solid oxide fuel cell , non blocking i/o , cathode , lanthanum , methane , analytical chemistry (journal) , oxide , electrode , inorganic chemistry , catalysis , chemistry , metallurgy , biochemistry , organic chemistry , chromatography
We demonstrate the applicability of LAMOX as an electrolyte for solid oxide fuel cells (SOFC) by preparing two anode‐supported cells based on La 0.9 Dy 0.1 Mo 2 O 9 and La 0.9 Dy 0.1 Mo 1 W 1 O 9 , and operating at 625°–700°C under single chamber conditions. The two cells, supported by a composite of NiO and Gd‐doped ceria (GDC), are initialized with a porous Ni+GDC disk to catalyze the partial oxidation reaction of methane. The partially oxidized methane reduces NiO to Ni catalyst and activates the cell at 650°C. A typical membrane electrode assembly of the single chamber SOFC cell consists of a 60‐μm‐thick La 0.9 Dy 0.1 Mo 2 O 9 electrolyte, an anode of Ni+GDC, and a cathode of lanthanum strontium cobalt ferrite. Its peak power measures 220 mW/cm 2 at 700°C in a tubular chamber of 15 mm in diameter, with the total methane/air flow rate of 350 mL/min and CH 4 :O 2 =2:1.