Effects of Cr/Ti co-doping on the electrical and thermal properties of tantalum-based electrolyte materials for solid oxide fuel cells

2020 ◽  
Vol 31 (20) ◽  
pp. 17307-17319
Author(s):  
Shuang Ding ◽  
Junwei Zhang ◽  
Shun Yang ◽  
Ziyang Song ◽  
Hong Jiang ◽  
...  
Keyword(s):  
Thermal Properties ◽  
Fuel Cells ◽  
Solid Oxide Fuel Cells ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Co Doping

Triggering interfacial activity of traditional La0.5Sr0.5MnO3 cathode with Co-doping for proton-conducting solid oxide fuel cells

2022 ◽  
Author(s):  
Yanru Yin ◽  
shoufu yu ◽  
Hailu Dai ◽  
Lei Bi
Keyword(s):  
Fuel Cells ◽  
Solid Oxide Fuel Cells ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Proton Conducting ◽  
Interfacial Activity ◽  
Co Doping ◽  
New Material ◽  
Improved Performance

Doping La0.5Sr0.5MnO3-δ (LSM) cathode with the Co element allows the new material La0.5Sr0.5Mn0.9Co0.1O3-δ (LSMCo) to show improved performance compared with the Co-free LSM for proton-conducting solid oxide fuel cells (H-SOFCs),...

Evaluation of SrTi1−xCoxO3 Perovskites (0 ≤ x ≤ 0.2) as Interconnect Materials for Solid Oxide Fuel Cells

2011 ◽  
Vol 8 (5) ◽  
Author(s):  
Masashi Mori ◽  
Zhenwei Wang ◽  
Nobuyuki Serizawa ◽  
Takanori Itoh
Keyword(s):  
Fuel Cells ◽  
Solid Oxide Fuel Cells ◽  
Linear Thermal Expansion Coefficient ◽  
Perovskite Phase ◽  
Linear Thermal Expansion ◽  
Secondary Phase ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Co Doping ◽  
Reducing Atmosphere

The compatibility of SrTi1−xCoxO3 perovskites (0 ≤ x ≤ 0.2) was evaluated for use as interconnect materials in solid oxide fuel cells (SOFCs). Although SrTi1−xCoxO3 perovskites have a single perovskite phase in the range of 0 ≤ x ≤ 0.2, it was observed for SrTi0.8Co0.2O3 that Co element agglomerated at the grain boundary during sintering. The dense SrTi0.8Co0.2O3 sample was destroyed and included Sr2TiO4 as a secondary phase after reducing treatment at 1000 °C. As a result of Co doping, the linear thermal expansion coefficient (TEC) increased remarkably with increasing Co content, but the TEC of SrTi0.9Co0.1O3 was comparable with those of SOFC cathodes and anodes. Co doping of SrTiO3 effectively increased electrical conductivity in air, whereas the conductivity of Co-doped SrTiO3 in a reducing atmosphere was much lower than that in air. This suggests that the Co ions3+/4+ in the perovskites were earlier reduced into Co2+ ions, compared to Ti4+ ions.

Evaluation of Porous Ni-YSZ Cermets With Ni Content of 0–30 Vol. % as Insulating Substrates for Segmented-in-Series Tubular Solid Oxide Fuel Cells

2012 ◽  
Vol 9 (2) ◽  
Author(s):  
Zhenwei Wang ◽  
Masashi Mori ◽  
Takanori Itoh
Keyword(s):  
Thermal Properties ◽  
Fuel Cells ◽  
Solid Oxide Fuel Cells ◽  
Open Circuit ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Ni Content ◽  
Isothermal Expansion ◽  
In Series ◽  
Oxide Ions

Nickel was added to a substrate composed of porous Y2O3-stabilized ZrO2 (YSZ) in order to minimize anode damage during redox cycling in segmented-in-series tubular solid oxide fuel cells (SOFCs) with YSZ electrolytes. In this study, the electrical insulating and thermal properties of these materials were evaluated for their suitability as substrates in the tubular SOFCs. When the Ni content was ≤20 vol. %, the porous cermets showed an electrical resistance of ≤67 Ω cm at 900 °C, indicating that the theoretical open circuit voltage for the tubular SOFCs could be achieved. However, the cermet with 20 vol. % Ni was destroyed during the first heating cycle in air because of large isothermal expansion. However, no obvious cracks were observed for cermets with ≤10 vol. % Ni. From the viewpoint of thermogravimetric measurement, this suggests that there are two redox mechanisms for Ni particles in the substrate. They were reduced/oxidized by both the gases and the oxide-ions passing through the YSZ framework. Based on the insulating and thermal properties of the substrate, the optimal composition was found to be approximately 10 vol. % Ni.

Thermal Properties of Na2O-MgO-TiO2-Al2O3-B2O3-SiO2 Glasses and Prospects for Their Use for Sealing Solid Oxide Fuel Cells

2019 ◽  
Vol 92 (7) ◽  
pp. 902-908
Author(s):  
L. F. Papko ◽  
M. V. Dyadenko ◽  
A. V. Kuz’min ◽  
D. A. Krainova ◽  
N. S. Saetova ◽  
...  
Keyword(s):  
Thermal Properties ◽  
Fuel Cells ◽  
Solid Oxide Fuel Cells ◽  
Solid Oxide ◽  
Oxide Fuel

Effects of trivalent dopants on phase stability and catalytic activity of YBaCo4O7-based cathodes in solid oxide fuel cells

2018 ◽  
Vol 6 (34) ◽  
pp. 16412-16420 ◽  
Author(s):  
Ke-Yu Lai ◽  
Arumugam Manthiram
Keyword(s):  
Catalytic Activity ◽  
Fuel Cells ◽  
Solid Oxide Fuel Cells ◽  
Phase Stability ◽  
Solid Oxide ◽  
Intermediate Temperature ◽  
Oxide Fuel ◽  
Co Doping ◽  
Doping Effects ◽  
Trivalent Cations

In order to understand the doping and co-doping effects of trivalent cations (Al3+, Ga3+, and Fe3+) in the swedenborgite oxide YBaCo4O7 as a cathode in intermediate-temperature SOFCs, four series of YBaCo4O7-based materials, including YBaCo4−xAlxO7+δ, YBaCo4−x−yGaxAlyO7+δ, YBaCo3.2Ga0.8−xFexO7+δ, and YBaCo3.5−xAl0.5FexO7+δ, have been synthesized and investigated.

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