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Synthesis and Electrochemical Studies of Novel Cobalt Free (Nd 0.9 La 0.1 ) 1.6 Sr 0.4 Ni 0.75 Cu 0.25 O 3.8 (NLSNC4) Cathode Material for IT‐SOFCs
Author(s) -
ShiraniFaradonbeh H.,
Paydar M. H.,
Paydar S.,
Gholaminezhad I.,
BazarganLari R.
Publication year - 2019
Publication title -
fuel cells
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.485
H-Index - 69
eISSN - 1615-6854
pISSN - 1615-6846
DOI - 10.1002/fuce.201900065
Subject(s) - materials science , cathode , analytical chemistry (journal) , electrochemistry , dielectric spectroscopy , electrolyte , samarium , electrical resistivity and conductivity , cobalt , polarization (electrochemistry) , conductivity , electrode , inorganic chemistry , chemistry , metallurgy , electrical engineering , chromatography , engineering
A novel cathode material of (Nd 0.9 La 0.1 ) 1.6 Sr 0.4 Ni 0.75 Cu 0.25 O 3.8 (NLSNC4), is synthesized by solid state reaction and is further investigated in combination with samarium doped ceria (SDC) as composite cathodes including 0, 10, 30, 50, and 70 of SDC electrolyte phase. The X‐ray diffraction analysis showed that NLSNC4 was produced in pure phase and was chemically compatible with SDC electrolyte. Electrical conductivities of single phase and composite cathode materials along with their electrochemical performances on SDC electrolytes in symmetric cells were measured by DC four‐probe method and electrochemical impedance spectroscopy (EIS), respectively. Results indicated that the maximum electrical conductivity is 135.56 S cm −1 at 350 °C, measured for single phase NLSNC4, sintered at 1,300 °C. Polarization resistance of pure NLSNC4 cathode was 2.71 Ω cm 2 at 800 °C, and NLSNC4‐x wt.% SDC composite cathodes displayed R p value of 0.35, 0.14, 0.12, and 0.32 Ω cm 2 at 800 °C, for x = 10, 30, 50, and 70, respectively.