Effect of TiO2 Addition on Phase Stability and Electrical Conductivity of Cubic Zirconia Used as an Electrolyte in Solid Oxide Fuel Cells

2019 ◽  
Vol 3 (9) ◽  
pp. 189-196
Author(s):  
Suleyman Tekeli ◽  
Metin Guru ◽  
Ali Akcimen ◽  
Osman Gurdal
Keyword(s):  
Electrical Conductivity ◽  
Fuel Cells ◽  
Solid Oxide Fuel Cells ◽  
Phase Stability ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Cubic Zirconia ◽  
Tio2 Addition

Structure, electrical, and thermal expansion properties of (La0.8Ca0.2)(Cr0.9–xCo0.1Nix)O3–δ interconnect materials for intermediate temperature solid oxide fuel cells

2009 ◽  
Vol 24 (5) ◽  
pp. 1748-1755 ◽  
Author(s):  
Yen-Pei Fu ◽  
Hsin-Chao Wang
Keyword(s):  
Electrical Conductivity ◽  
Fracture Toughness ◽  
Grain Size ◽  
Thermal Expansion ◽  
Fuel Cells ◽  
Solid Oxide Fuel Cells ◽  
Thermal Expansion Coefficient ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Nickel Doping

The microstructure, lattice parameters, electrical conductivity, thermal expansion, and mechanical properties of (La0.8Ca0.2)(Cr0.9–xCo0.1Nix)O3–δ (x = 0.03, 0.06, 0.09, 0.12) were systematically investigated in this work. Nickel doping of (La0.8Ca0.2)(Cr0.9Co0.1)O3–δ is an effective way of increasing the thermal expansion coefficient (TEC) and stabilizing the high-temperature phase transformation from rhombohedral to tetragonal. As the nickel-doped content increases, the TEC increases parabolically by TEC (x) (ppm/°C) = 10.575 + 63.3x−240x2 (x = 0.03−0.12). The electrical conductivity of (La0.8Ca0.2)(Cr0.9–xCo0.1Nix)O3–δ specimens increases systematically with increasing nickel substitution in the range of 0.03 ≤ x ≤ 0.09 and reaches a maximum for the composition of (La0.8Ca0.2)(Cr0.81Co0.1Ni0.09)O3–δ (σ850 °C ∼60.36 S/cm). There is a slight increase in the fracture toughness with increasing nickel doping content, and the fracture toughness is strongly affected by the grain size. It seems that there is an increase in the fracture toughness with decreasing grain size. However, the microhardness does not significantly depend on the grain size in this study. The (La0.8Ca0.2)(Cr0.81Co0.1Ni0.09)O3–δ specimen shows high electrical conductivity, a moderate thermal expansion coefficient, and nearly linear thermal expansion behavior from room temperature to 800 °C. It will be suitable for interconnect materials for intermediate temperature solid oxide fuel cells (IT-SOFCs).

Defect Chemistry and Electrical Conductivity of Sm-Doped La1–xSrxCoO3−δfor Solid Oxide Fuel Cells

2017 ◽  
Vol 121 (28) ◽  
pp. 15017-15027 ◽  
Author(s):  
Mårten E. Björketun ◽  
Ivano E. Castelli ◽  
Jan Rossmeisl ◽  
Thomas Olsen ◽  
Kenji Ukai ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Fuel Cells ◽  
Solid Oxide Fuel Cells ◽  
Defect Chemistry ◽  
Solid Oxide ◽  
Oxide Fuel

scholarly journals Tin doped PrBaFe2O5+δ anode material for solid oxide fuel cells

RSC Advances ◽  
2017 ◽  
Vol 7 (37) ◽  
pp. 22649-22661 ◽  
Author(s):  
Guohui Dong ◽  
Chunyang Yang ◽  
Fei He ◽  
Yanmei Jiang ◽  
Chunlei Ren ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Fuel Cells ◽  
Solid Oxide Fuel Cells ◽  
Anode Material ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
High Electrical Conductivity ◽  
Symmetrical Cell ◽  
Redox Stability ◽  
Better Than

PrBaFe1.9Sn0.1O5+δ shows excellent redox stability, high electrical conductivity, and ASR of a symmetrical cell as low as of 0.095–0.285 Ω cm2 from 850–750 °C in wet hydrogen, better than or comparable to the best of ceramic anodes in the open literature.

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