scholarly journals Hexagonal perovskite related oxide ion conductor Ba3NbMoO8.5: phase transition, temperature evolution of the local structure and properties

2019 ◽  
Vol 7 (44) ◽  
pp. 25503-25510 ◽  
Author(s):  
Matthew S. Chambers ◽  
Kirstie S. McCombie ◽  
Josie E. Auckett ◽  
Abbie C. McLaughlin ◽  
John T. S. Irvine ◽  
...  
Keyword(s):  
Solid Oxide Fuel Cells ◽  
Local Structure ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Structure And Properties ◽  
Ion Conductor ◽  
Oxide Ion Conductor ◽  
Oxide Ion Conductivity ◽  
Reducing Conditions ◽  
Oxide Ion

Ba3NbMoO8.5 has recently been demonstrated to exhibit competitive oxide ion conductivity and to be stable under reducing conditions, making it an excellent potential electrolyte for solid oxide fuel cells.

Sr3−3xNa3xSi3O9−1.5x (x = 0.45) as a superior solid oxide-ion electrolyte for intermediate temperature-solid oxide fuel cells

2014 ◽  
Vol 7 (5) ◽  
pp. 1680-1684 ◽  
Author(s):  
Tao Wei ◽  
Preetam Singh ◽  
Yunhui Gong ◽  
John B. Goodenough ◽  
Yunhui Huang ◽  
...  
Keyword(s):  
Activation Energy ◽  
Fuel Cells ◽  
Solid Oxide Fuel Cells ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Ion Conductor ◽  
Oxide Ion Conductor ◽  
Oxide Ion Conductivity ◽  
Oxide Ion Conductors ◽  
Oxide Ion

A new solid oxide-ion conductor Sr3−3xNa3xSi3O9−1.5x (x = 0.45) exhibits the highest oxide-ion conductivity with the lowest activation energy among all the known chemically stable oxide-ion conductors.

Intermediate Temperature Solid Oxide Fuel Cells Using a New LaGaO3 Based Oxide Ion Conductor: I. Doped as a New Cathode Material

1998 ◽  
Vol 145 (9) ◽  
pp. 3177-3183 ◽  
Author(s):  
Tatsumi Ishihara ◽  
Miho Honda ◽  
Takaaki Shibayama ◽  
Hiroaki Minami ◽  
Hiroyasu Nishiguchi ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Solid Oxide Fuel Cells ◽  
Cathode Material ◽  
Solid Oxide ◽  
Intermediate Temperature ◽  
Oxide Fuel ◽  
Ion Conductor ◽  
Oxide Ion Conductor ◽  
Oxide Ion

Low temperature operation of a solid-oxide Fe–air rechargeable battery using a La0.9Sr0.1Ga0.8Mg0.2O3 oxide ion conductor

2015 ◽  
Vol 3 (16) ◽  
pp. 8260-8264 ◽  
Author(s):  
A. Inoishi ◽  
J. Hyodo ◽  
H. Kim ◽  
T. Sakai ◽  
S. Ida ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Low Temperature ◽  
Solid Oxide Fuel Cells ◽  
Solid Oxide ◽  
Rechargeable Battery ◽  
Oxide Fuel ◽  
Ion Conductor ◽  
Oxide Ion Conductor ◽  
Temperature Operating ◽  
Oxide Ion

We investigated a catalyst for oxidation of Fe powder using steam and it was applied to a Fe–air rechargeable battery based on the low temperature operating Solid Oxide Fuel Cells technology.

Oxide ion conductivity in La(Sr)Ga(Fe,Mg)O3 and its application for solid oxide fuel cells

2006 ◽  
Vol 408-412 ◽  
pp. 507-511 ◽  
Author(s):  
Tatsumi Ishihara ◽  
Masaki Ando ◽  
Makiko Enoki ◽  
Yusaku Takita
Keyword(s):  
Fuel Cells ◽  
Solid Oxide Fuel Cells ◽  
Solid Oxide ◽  
Ion Conductivity ◽  
Oxide Fuel ◽  
Oxide Ion Conductivity ◽  
Oxide Ion

scholarly journals Influence of Isovalent ‘W’ Substitutions on the Structure and Electrical Properties of La2Mo2O9 Electrolyte for Intermediate-Temperature Solid Oxide Fuel Cells

Ceramics ◽  
2021 ◽  
Vol 4 (3) ◽  
pp. 502-515
Author(s):  
Tanmoy Paul ◽  
Yoed Tsur
Keyword(s):  
Fuel Cells ◽  
High Temperature ◽  
Solid Oxide Fuel Cells ◽  
Solid Oxide ◽  
Cubic Phase ◽  
Oxide Fuel ◽  
X Ray Diffraction ◽  
X Ray ◽  
Oxide Ion Conductivity ◽  
Oxide Ion

Lanthanum molybdenum oxide (La2Mo2O9, LAMOX)-based ion conductors have been used as potential electrolytes for solid oxide fuel cells. The parent compound La2Mo2O9 undergoes a structural phase transition from monoclinic (P21) to cubic (P213) at 580 °C, with an enhancement in oxide ion conductivity. The cubic phase is of interest because it is beneficial for oxide ion conduction. In search of alternative candidates with a similar structure that might have a stable cubic phase at lower temperatures, we have studied the variations of the crystal structure and ionic conductivity for 25, 50, 62.5 and 75 mol% W substitutions at the Mo site using high-temperature X-ray diffraction, dilatometry, and impedance spectroscopy. Highly dense ceramic samples have been synthesized by solid-state reaction in a two-step sintering process. Low-angle X-ray diffraction and Rietveld refinement confirm the stabilization of the cubic phase for all compounds in the entire temperature range considered. The substitutions of W at the Mo site produce a decrement in the lattice parameter. The thermal expansion coefficients in the high-temperature range of the W-substituted ceramics, as determined by dilatometry, are much higher than that of the unmodified sample. The impedance spectra have been modeled using a modified genetic algorithm within 300–600 °C. A distribution function of the relaxation times is obtained, and the contributions of ohmic drop, grains and grain boundaries to the conductivity have been identified. Overall, our investigation provides information about cationic substitution and insights into the understanding of oxide ion conductivity in LAMOX-based compounds for developing solid oxide fuel cells.

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