Water incorporation and proton conductivity in titanium substituted barium indate

Quarez, Éric; Noirault, Samuel; Caldés, Maria Teresa; Joubert, Olivier

doi:10.1016/j.jpowsour.2009.08.086

Cited by 56 publications

(42 citation statements)

References 25 publications

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“…The maximum proton conductivity is thus reflected by the plateau at 600−300°C observed in wet Ar and amounts to ∼7 × 10 −4 S/cm at 450°C, which is comparable to that reported by Quarez et al 5,6 for the same composition.…”

Section: Resultssupporting

confidence: 88%

Hydration Thermodynamics of the Proton Conducting Oxygen-Deficient Perovskite Series BaTi_1–xM_xO_3–x/2 with M = In or Sc

et al. 2015

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This article establishes the effect of structure and composition on water uptake and the hydration and proton transport properties of the oxygen-deficient perovskite series BaTi1-x(In,Sc)xO3-x/2, with 0.2 ≤ x ≤ 0.7. The equilibrium water uptake is determined by thermogravimetry, while combining thermogravimetry with differential scanning calorimetry allows for direct determination of the materials' hydration thermodynamics. Proton and oxide ion transport properties are characterized by means of ac impedance measurements up to 1000 °C. In general, the hydration thermodynamics of the scandates are more favorable than that of the indates and are also affected by changes in crystal structure throughout the series. The more favorable hydration thermodynamics of cubic scandates increase their proton conductivity at higher temperatures compared to their indate counterparts. In contrast to the BaTi1-xInxO3-x/2 series, the BaTi1-xScxO3-x/2 (0.5 ≤ x ≤ 0.7) materials retain their cubic structures upon full saturation by protons and show no signs of chemical instability upon exposure to 1 atm H2O(g) down to 100 °C. The BaTi1-xScxO3-x/2 materials with 0.5 ≤ x ≤ 0.7 may therefore find application in, for instance, steam electrolysis or similar processes involving high water vapor pressures.

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Section: Resultssupporting

confidence: 88%

Hydration Thermodynamics of the Proton Conducting Oxygen-Deficient Perovskite Series BaTi_1–xM_xO_3–x/2 with M = In or Sc

et al. 2015

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“…Journal of The Electrochemical Society, 162 (8) F927-F938 (2015) include (V, Mo, W), 25 Ti, 26 Zr, 27 Ce, 28 Si, 29 (P, S) 30 replaced with In and La 31 replaced with Ba, or (La, Si or La, P) 32 co-doped in both Ba and In.…”

Section: F928mentioning

confidence: 99%

“…19,25,26,[29][30][31][32]45 The conductivity of nondoped Ba 2 In 2 O 5 was relatively low, although it significantly increased when δ was reduced to less than 0.4.…”

Section: Conductivity In Dry O 2 and 8% Humidified O 2 -mentioning

confidence: 99%

Ionic Conduction and Power Generation Characteristics of Pr-Doped Ba₂In₂O₅for Proton-Conducting SOFCs

Ihara

2015

J. Electrochem. Soc.

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Highly Pr-doped Ba 2 In 2 O 5 (PBI) was successfully fabricated and its ionic conduction and power generation characteristics were studied in this work. Two PBI materials of different concentration ratio were evaluated: Pr:Ba:In = 0.9:1.1:1 (PBI910) and Pr:Ba:In = 1:1:1 (PBI000). PBI910 material was confirmed as single phase with cubic perovskite structure. However, PBI000 had both cubic phase and impurity phase. In a hydrogen concentration cell, the measured proton transfer number t H + of PBI910 at 500 • C was 0.81 and then decreased with increasing temperature, whereas the oxide ion transfer number t O 2− was 0.07 and then increased with increasing temperature. Power generation experiments were evaluated at 500 • C to 900 • C using PBI as electrolyte and H 2 as fuel. Results revealed that t H + and t O 2− showed different dependency on temperature and significantly affected the power density. Proton conduction dominated from 500 • C∼600 • C, and power density increased with increasing operating temperature due to improved proton conductivities. However, at 600∼800 • C, proton conductivities decreased, which caused a decrease in power density. Further increase in temperature into the 800 • C∼900 • C range showed oxide ion conduction to then dominate, and the consequent improved oxide ion conductivity again increased the power density Currently used SOFCs operate at temperatures above 800• C because their Y 2 O 3 -stabilized ZrO 2 electrolyte (YSZ) requires high temperature to limit ohmic losses across the electrolyte. However, the goal in SOFC development of lowering the operating temperature can significantly improve the reliability, durability, and stability of SOFCs. One target of recent SOFC research is to develop intermediate temperature SOFC systems (IT-SOFCs), namely, operating at 500• C∼700• C. Operating at such intermediate temperature has several advantages. First, reactions between the cell components are suppressed 1 , thus improving the durability of the system. Second, the electrochemical reaction on an electrode is rapid compared with that at temperatures below 500• C, and thus the over potential is relatively low, which in turn enables a high power density. To develop IT-SOFCs, faster ionic conductors are needed to replace the conventional YSZ electrolyte. 2-6A recent strategy is the use of ceramic materials with high proton conductivities as electrolyte for Compared with oxide-ion-conducting SOFCs, proton-conducting SOFCs (PC-SOFCs) generate water at the cathode side. Theoretically, open current voltage (OCV) calculated by the Nernst equation should be kept high under high fuel utilization operation conditions in PCSOFCs and thus provide an opportunity to develop a system with both high power density and high fuel utilization.8 Among reported proton conductors, materials with perovskite structure show higher conductivities than other structures such as LaP 3 O 9 , 9 LaNbO 4 , 10 and LaBaGaO 4 .11 In perovskite-type materials, the highest conductivities have been achieved using BaCeO 3 doped w...

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“…The most studied method for modification of their structure and optimization of physicochemical properties is a homogeneous cationic doping [1][2][3][4][5]. However, the homogeneous anionic doping is a new promising way for the obtaining of new materials with improved properties.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Simultaneous Homo- and Heterogeneous Doping on Transport Properties of Ba2In2O5

Tarasova¹,

Анимица²,

Галишева³

et al. 2018

Kms

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Water incorporation and proton conductivity in titanium substituted barium indate

Cited by 56 publications

References 25 publications

Hydration Thermodynamics of the Proton Conducting Oxygen-Deficient Perovskite Series BaTi_1–xM_xO_3–x/2 with M = In or Sc

Hydration Thermodynamics of the Proton Conducting Oxygen-Deficient Perovskite Series BaTi_1–xM_xO_3–x/2 with M = In or Sc

Ionic Conduction and Power Generation Characteristics of Pr-Doped Ba₂In₂O₅for Proton-Conducting SOFCs

The Effect of Simultaneous Homo- and Heterogeneous Doping on Transport Properties of Ba2In2O5

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Water incorporation and proton conductivity in titanium substituted barium indate

Cited by 56 publications

References 25 publications

Hydration Thermodynamics of the Proton Conducting Oxygen-Deficient Perovskite Series BaTi1–xMxO3–x/2 with M = In or Sc

Hydration Thermodynamics of the Proton Conducting Oxygen-Deficient Perovskite Series BaTi1–xMxO3–x/2 with M = In or Sc

Ionic Conduction and Power Generation Characteristics of Pr-Doped Ba2In2O5for Proton-Conducting SOFCs

The Effect of Simultaneous Homo- and Heterogeneous Doping on Transport Properties of Ba2In2O5

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Hydration Thermodynamics of the Proton Conducting Oxygen-Deficient Perovskite Series BaTi_1–xM_xO_3–x/2 with M = In or Sc

Hydration Thermodynamics of the Proton Conducting Oxygen-Deficient Perovskite Series BaTi_1–xM_xO_3–x/2 with M = In or Sc

Ionic Conduction and Power Generation Characteristics of Pr-Doped Ba₂In₂O₅for Proton-Conducting SOFCs