Effects of La0.9Sr0.1Ga0.9Mg0.1O3−δon the microstructure and ionic conductivity of purity/impure Ce0.8Nd0.2O1.9electrolytes

Wei, Dong; Zhou, Defeng; Xie, Shenkun; Yang, Guocheng; Meng, Jian

doi:10.1039/c5ra21809h

Cited by 4 publications

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“…This was associated with Ga‐rich phases (LaSrGa 3 O 7 ) which were easily formed in A‐site cation deficient LSGM . Thus, La 3+ diffusion could favor sintering and reduce the generation of impurity phases at excess of A‐site ,. Furthermore, LaSrGaO 4 and LaSrGa 3 O 7 impurities are usually associated with the incomplete dissolution of SrO/MgO .…”

Section: Resultsmentioning

confidence: 99%

Effect of A/B‐Site Non‐stoichiometry on the Structure and Properties of La_0.9Sr_0.1Ga_0.9Mg_0.1O_3−δ Solid Electrolyte in Intermediate‐Temperature Solid Oxide Fuel Cells

et al. 2017

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La 0.9 Sr 0.1 ) x (Ga 0.9 Mg 0.1 ) y O 3-d [(LS) x (GM) y ] (x = 0.97, 1.00, 1.03; y = 1.00 and x = 1.00; y = 0.97, 1.00, 1.03) electrolyte is prepared through a sol-gel method followed by sintering at 1300 8C for 10 h. The microstructures of the samples are characterized by using X-ray diffraction (XRD) and field-emission scanning electron microscopy (FE-SEM). The electrical and thermal stability properties are measured by means of electrochemical impedance spectroscopy (EIS) and thermal expansion coefficient (TEC), respectively. It is shown that phase purity could improve by adjusting the non-stoichiometry of A/B-site. This, in turn, affects the conductivity and thermal expansion of the solid electrolyte. The samples with B-site defects [LS(GM) 0.97 ] are found to exhibit the best phase purity and density with minimal grain boundary/total resistances, and superior thermal stability. The conductivity of LS(GM) 0.97 is 1.56 time higher than that of LSGM. The average thermal expansion coefficient of LS(GM) 0.97 at 50-850 8C is 4.13 % lower than that of LSGM. The maximum power density of single cells containing LS(GM) 0.97 electrolyte could reach 0.54 W cm À1 at 800 8C, which is 16.7 % higher than that of cells containing LSGM electrolyte. The stability test for over 120 h at 800 8C indicates a slight decrease in performances during the first 10 h, but no significant differences in electrode polarization are observed even after long-term operation. These findings suggest the potential applications of LS(GM) 0.97 as a novel electrolyte for intermediate-temperature solid oxide fuel cells.[a] J.

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Section: Resultsmentioning

confidence: 99%

Effect of A/B‐Site Non‐stoichiometry on the Structure and Properties of La_0.9Sr_0.1Ga_0.9Mg_0.1O_3−δ Solid Electrolyte in Intermediate‐Temperature Solid Oxide Fuel Cells

et al. 2017

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Enhanced sintering of Ce 0.8 Nd 0.2 O 2−δ -La 0.8 Sr 0.2 Ga 0.8 Mg 0.2 O 3−δ using CoO as a sintering aid

Chen

Zhou

Wang

et al. 2017

Ceramics International

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Revisiting the ionic conductivity of solid oxide electrolytes: a technical review

Matkin,

Starostina,

Hanif

et al. 2024

J. Mater. Chem. A

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Effects of La_0.9Sr_0.1Ga_0.9Mg_0.1O_3−δon the microstructure and ionic conductivity of purity/impure Ce_0.8Nd_0.2O_1.9electrolytes

Abstract: Three-dimensional schematics of the microstructure of these Ce0.8Nd0.2O1.9 samples, outlining the effects on SiO2 impurities of La0.9Sr0.1Ga0.9Mg0.1O3−δ additives.

Cited by 4 publications

References 39 publications

Effect of A/B‐Site Non‐stoichiometry on the Structure and Properties of La_0.9Sr_0.1Ga_0.9Mg_0.1O_3−δ Solid Electrolyte in Intermediate‐Temperature Solid Oxide Fuel Cells

Effect of A/B‐Site Non‐stoichiometry on the Structure and Properties of La_0.9Sr_0.1Ga_0.9Mg_0.1O_3−δ Solid Electrolyte in Intermediate‐Temperature Solid Oxide Fuel Cells

Enhanced sintering of Ce 0.8 Nd 0.2 O 2−δ -La 0.8 Sr 0.2 Ga 0.8 Mg 0.2 O 3−δ using CoO as a sintering aid

Revisiting the ionic conductivity of solid oxide electrolytes: a technical review

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Effects of La0.9Sr0.1Ga0.9Mg0.1O3−δon the microstructure and ionic conductivity of purity/impure Ce0.8Nd0.2O1.9electrolytes

Abstract: Three-dimensional schematics of the microstructure of these Ce0.8Nd0.2O1.9 samples, outlining the effects on SiO2 impurities of La0.9Sr0.1Ga0.9Mg0.1O3−δ additives.

Cited by 4 publications

References 39 publications

Effect of A/B‐Site Non‐stoichiometry on the Structure and Properties of La0.9Sr0.1Ga0.9Mg0.1O3−δ Solid Electrolyte in Intermediate‐Temperature Solid Oxide Fuel Cells

Effect of A/B‐Site Non‐stoichiometry on the Structure and Properties of La0.9Sr0.1Ga0.9Mg0.1O3−δ Solid Electrolyte in Intermediate‐Temperature Solid Oxide Fuel Cells

Enhanced sintering of Ce 0.8 Nd 0.2 O 2−δ -La 0.8 Sr 0.2 Ga 0.8 Mg 0.2 O 3−δ using CoO as a sintering aid

Revisiting the ionic conductivity of solid oxide electrolytes: a technical review

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Effects of La_0.9Sr_0.1Ga_0.9Mg_0.1O_3−δon the microstructure and ionic conductivity of purity/impure Ce_0.8Nd_0.2O_1.9electrolytes

Effect of A/B‐Site Non‐stoichiometry on the Structure and Properties of La_0.9Sr_0.1Ga_0.9Mg_0.1O_3−δ Solid Electrolyte in Intermediate‐Temperature Solid Oxide Fuel Cells

Effect of A/B‐Site Non‐stoichiometry on the Structure and Properties of La_0.9Sr_0.1Ga_0.9Mg_0.1O_3−δ Solid Electrolyte in Intermediate‐Temperature Solid Oxide Fuel Cells