Electrical conductivity, thermal expansion and electrochemical properties of Fe-doped La0.7Sr0.3CuO3−δ cathodes for solid oxide fuel cells

2009 ◽  
Vol 475 (1-2) ◽  
pp. 418-421 ◽  
Author(s):  
Xifeng Ding ◽  
Chong Cui ◽  
Xuejuan Du ◽  
Lucun Guo
Keyword(s):  
Electrical Conductivity ◽  
Thermal Expansion ◽  
Fuel Cells ◽  
Solid Oxide Fuel Cells ◽  
Electrochemical Properties ◽  
Solid Oxide ◽  
Oxide Fuel

scholarly journals Oxygen permeation, thermal expansion behavior and electrochemical properties of LaBa0.5Sr0.5Co2O5+δ cathode for SOFCs

RSC Advances ◽  
2017 ◽  
Vol 7 (24) ◽  
pp. 14487-14495 ◽  
Author(s):  
Adi Subardi ◽  
Kun-Yu Liao ◽  
Yen-Pei Fu
Keyword(s):  
Thermal Expansion ◽  
Fuel Cells ◽  
Solid Oxide Fuel Cells ◽  
Electrochemical Properties ◽  
Double Perovskite ◽  
Oxygen Permeation ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Thermal Expansion Behavior ◽  
Expansion Behavior

In this study, the double perovskite LaBa0.5Sr0.5Co2O5+δ (LBSC55) is investigated as a potential cathode for solid oxide fuel cells (SOFCs).

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).

Synthesis, Electrical Conductivity and Electrochemical Properties of SrFe1−xSbxO3−δ as Cathode Materials for IT-SOFCs

2014 ◽  
Vol 672-674 ◽  
pp. 696-699
Author(s):  
Xiu Ling Yu ◽  
Xue Li
Keyword(s):  
Electrical Conductivity ◽  
Fuel Cells ◽  
Solid State ◽  
Solid Oxide Fuel Cells ◽  
Electrochemical Properties ◽  
Cathode Materials ◽  
Solid State Reaction ◽  
Perovskite Oxides ◽  
Solid Oxide ◽  
Oxide Fuel

Fe-based perovskite oxides SrFe1-xSbxO3-δ (SFS, x = 0.05–0.15) have been prepared by a solid-state reaction and studied as novel cathode materials for intermediate temperature solid oxide fuel cells (IT-SOFCs). As SOFC cathodes, the highest electrical conductivity of 100 S cm−1 at 425 oC in air was obtained for the x = 0.05 sample. The area-specific resistances of the SFS ( x = 0.05) cathode on the LSGM electrolyte where at 700 oC is 0.17 Ω cm2. All these results demonstrates that Sb-substituted SFS perovskites materials are promising cheaper alternative cathodes for an IT-SOFC.

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