Performance of Ce0.85Sm0.15O1.9–La0.9Sr0.1Ga0.8Mg0.2O2.85 composite electrolytes for intermediate-temperature solid oxide fuel cells

Hao, Guangye; Liu, Xiaomei; Wang, Haopeng; Be, Hailin; Li, Pei; Su, Wenhui

doi:10.1016/j.ssi.2012.03.005

Cited by 15 publications

(3 citation statements)

References 10 publications

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“…SDC-LSGM, in the 9:1 proportion, was reported to display superior conductivity than pure SDC (9). Addition of LSGM to SDC was also found to enlarge the electrolytic domain of SDC (10). Similar effects were found for La 0.8 Sr 0.2 Ga 0.8 Mg 0.2 O 3-δ -Ce 0.9 Gd 0.1 O 1.95 composites (11).…”

Section: Introductionmentioning

confidence: 57%

Electrical Conductivity of La_0.9Sr_0.1Ga_0.8Mg_0.2O_3-D/La_1.55Sr_0.45Ga₃O_7+D Composite Electrolyte

Fujimoto¹,

Steil

Muccillo³

2021

ECS Trans.

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Doped lanthanum gallate constitutes a family of solid electrolytes with high ionic conductivity, wide electrolytic domain, and good chemical stability. The combination of its properties turns some compounds of this family promising candidates for application in solid oxide cells operating at intermediate temperatures. In this work, La0.9Sr0.1Ga0.8Mg0.2O3-y - xLa1.55Sr0.45Ga3O7+δ with x = 0, 1, and 5 wt.% were investigated aiming to obtain a composite solid electrolyte with optimized properties compared to the parent material. Composite electrolytes were prepared by solid state reaction method and evaluated for densification, phase content, and microstructure. Electrical conductivity measurements were carried out as a function of temperature and oxygen partial pressure. Increase on densification and structural homogeneity were obtained with increasing fraction of the melilite phase. The electrical conductivity determined by impedance spectroscopy revealed a decrease of the bulk resistivity for increasing amounts of La1.55Sr0.45Ga3O7+δ.

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Section: Introductionmentioning

confidence: 57%

Electrical Conductivity of La_0.9Sr_0.1Ga_0.8Mg_0.2O_3-D/La_1.55Sr_0.45Ga₃O_7+D Composite Electrolyte

Fujimoto¹,

Steil

Muccillo³

2021

ECS Trans.

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“…In literature, Li et al reported that the composite electrolytes of Ce 0.9 Gd 0.1 O 1.9 matrix with the addition of La 0.9 Sr 0.1 Ga 0.8 Mg 0.2 O 2.85 in a content of 5‐15 wt.% had a slightly lower grain bulk conductivity but a far higher grain boundary conductivity than pure Ce 0.9 Gd 0.1 O 1.9 at a temperature of 300 ~ 550°C, because the grain size of Ce 0.9 Gd 0.1 O 1.9 ‐La 0.9 Sr 0.1 Ga 0.8 Mg 0.2 O 2.85 was greatly increased and thus the area of the grain boundary was remarkably decreased. Similar phenomena have been also reported on 90 wt.% Ce 0.85 Sm 0.15 O 1.9 ‐ 10 wt.% (La 0.95 Sr 0.05 ) x Ga 0.9 Mg 0.1 O 3−δ ( x = 0.97‐1.03) and x wt.% Ce 0.8 Nd 0.2 O 1.9 ‐ (100‐ x ) wt.% La 0.9 Sr 0.1 Ga 0.8 Mg 0.2 O 2.85 ( x = 85‐95) composite electrolytes . In addition, Xu et al reported that the 90 wt.% Ce 0.85 Sm 0.15 O 1.9 ‐ 10 wt.% La 0.9 Sr 0.1 Ga 0.8 Mg 0.2 O 2.85 (SL9010) composite electrolyte had a higher electrical conductivity as compared to pure Ce 0.85 Sm 0.15 O 1.9 over the temperature range of 500 ~ 700°C, and the maximum power density was 250 mW cm −2 at 800°C.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and electrical conductivity of La_0.9Sr_0.1Ga_0.8Mg_0.2O_2.85‐Ce_0.8Gd_0.2O_1.9 composite electrolytes for SOFCs

Lin

et al. 2018

Int J Applied Ceramic Tech

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(100‐x) wt.% La0.9Sr0.1 Ga0.8Mg0.2O2.85 ‐ x wt.% Ce0.8Gd0.2O1.9 (x = 0, 5, 10, 20) electrolytes were prepared by solid‐state reaction. The composition, microstructure, and electrical conductivity of the samples were investigated. At 300 ~ 600°C, the pure La0.9Sr0.1 Ga0.8Mg0.2O2.85 electrolyte has a higher conductivity compared to the composite electrolytes, but at 650 ~ 800°C the 95 wt.% La0.9Sr0.1 Ga0.8Mg0.2O2.85 ‐ 5 wt.% Ce0.8Gd0.2O1.9 composite electrolyte presents the highest conductivity, reaching 0.035 S cm−1 at 800°C. The cell performances based on La0.9Sr0.1 Ga0.8Mg0.2O2.85‐Ce0.8Gd0.2O1.9 electrolytes were measured using Sr2CoMoO6‐La0.9Sr0.1 Ga0.8Mg0.2O2.85 as anode and Sr2Co0.9Mn0.1NbO6 ‐La0.9Sr0.1 Ga0.8Mg0.2O2.85 as cathode, respectively. At 800°C, the measured open‐circuit voltages are higher than 1.08 V, and the maximum power density and current density of the fuel cell prepared with 95 wt.% La0.9Sr0.1 Ga0.8Mg0.2O2.85 ‐ 5 wt.% Ce0.8Gd0.2O1.9 electrolyte reach 192 mW cm−2 and 720 mA cm−2, respectively.

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“…O tamanho de grão dos compósitos aumentou nitidamente, enquanto que a resistência dos contornos de grão pode ser significativamente diminuída por uma pequena adição de LSGM. O compósito que exibiu máxima condutividade elétrica e densidade de potência foi o da proporção de 9,5:0,5 [65].…”

Section: Compósitos à Base De 8ysz E De Lsgmunclassified

Preparação e caracterização de compósitos condutores iônicos à base de zircônia estabilizada com ítria e galato de lantânio dopado

Fujimoto¹

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Performance of Ce0.85Sm0.15O1.9–La0.9Sr0.1Ga0.8Mg0.2O2.85 composite electrolytes for intermediate-temperature solid oxide fuel cells

Cited by 15 publications

References 10 publications

Electrical Conductivity of La_0.9Sr_0.1Ga_0.8Mg_0.2O_3-D/La_1.55Sr_0.45Ga₃O_7+D Composite Electrolyte

Electrical Conductivity of La_0.9Sr_0.1Ga_0.8Mg_0.2O_3-D/La_1.55Sr_0.45Ga₃O_7+D Composite Electrolyte

Microstructure and electrical conductivity of La_0.9Sr_0.1Ga_0.8Mg_0.2O_2.85‐Ce_0.8Gd_0.2O_1.9 composite electrolytes for SOFCs

Preparação e caracterização de compósitos condutores iônicos à base de zircônia estabilizada com ítria e galato de lantânio dopado

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Performance of Ce0.85Sm0.15O1.9–La0.9Sr0.1Ga0.8Mg0.2O2.85 composite electrolytes for intermediate-temperature solid oxide fuel cells

Cited by 15 publications

References 10 publications

Electrical Conductivity of La0.9Sr0.1Ga0.8Mg0.2O3-D/La1.55Sr0.45Ga3O7+D Composite Electrolyte

Electrical Conductivity of La0.9Sr0.1Ga0.8Mg0.2O3-D/La1.55Sr0.45Ga3O7+D Composite Electrolyte

Microstructure and electrical conductivity of La0.9Sr0.1 Ga0.8Mg0.2O2.85‐Ce0.8Gd0.2O1.9 composite electrolytes for SOFCs

Preparação e caracterização de compósitos condutores iônicos à base de zircônia estabilizada com ítria e galato de lantânio dopado

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Product

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Electrical Conductivity of La_0.9Sr_0.1Ga_0.8Mg_0.2O_3-D/La_1.55Sr_0.45Ga₃O_7+D Composite Electrolyte

Electrical Conductivity of La_0.9Sr_0.1Ga_0.8Mg_0.2O_3-D/La_1.55Sr_0.45Ga₃O_7+D Composite Electrolyte

Microstructure and electrical conductivity of La_0.9Sr_0.1Ga_0.8Mg_0.2O_2.85‐Ce_0.8Gd_0.2O_1.9 composite electrolytes for SOFCs