Studies on effect of Ca-doping on structure and electrochemical properties of garnet-type Y3-xCaxFe5O12-o
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- @Article{ZHANG:2020:JSSC,
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author = "Zheyu Zhang and Kalpana Singh and Yoed Tsur and
Jigang Zhou and James J. Dynes and Venkataraman Thangadurai",
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title = "Studies on effect of {Ca}-doping on structure and
electrochemical properties of garnet-type
{Y3-xCaxFe5O12-o}",
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journal = "Journal of Solid State Chemistry",
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year = "2020",
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volume = "290",
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pages = "121530",
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month = oct,
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keywords = "genetic algorithms, genetic programming, Calcium,
Yttrium iron garnet, Oxygen non-stoichiometry, Oxygen
reduction reaction, Impedance spectroscopy genetic
programming",
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ISSN = "0022-4596",
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URL = "http://www.sciencedirect.com/science/article/pii/S0022459620303601",
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DOI = "doi:10.1016/j.jssc.2020.121530",
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size = "11 pages",
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abstract = "In this study, effect of Ca-doping on electrical and
electrochemical properties of garnet structure
Y3-xCaxFe5O12-delta (x = 0, 0.05, 0.1, 0.3, 0.5
and 0.7) was investigated. Cubic-phase (Ia-3d) garnet
was prepared through sol-gel method and sintered at
1100 degreeC for 2 h in air. Highest oxygen
non-stoichiometry (delta = 0.19) was found in x =
0.3 member. X-ray absorption spectroscopy (XAS)
confirmed the formation of hole carriers () due to
Ca-substitution for Y in Y3Fe5O12. 4-Probe DC
measurements showed that electrical conductivity
increased with an increase in Calcium amount until x
= 0.1 (1.58 S/cm at 750 degreeC) and then
decreased due to decrease in the concentration of the
charge carriers. Lowest area specific resistance (ASR)
of 1 ohms cm2 was seen at 750 degreeC in air for the
symmetrical cell with x = 0.3 garnet-LSGM
composite electrode. Studies on pO2 dependent ASR and
impedance spectroscopy genetic programming (ISGP)
analysis revealed that oxygen dissociation and partial
reduction of adsorbed oxygen molecule co-limit the
electrochemical performance for oxygen reduction
reaction (ORR).",
- }
Genetic Programming entries for
Zheyu Zhang
Kalpana Singh
Yoed Tsur
Jigang Zhou
James J Dynes
Venkataraman Thangadurai
Citations