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.

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),...

Performance evaluation of a new Fe-Cr-Mn alloy in the reducing atmosphere of solid oxide fuel cells

2018 ◽  
Vol 769 ◽  
pp. 866-872 ◽  
Author(s):  
Wenying Zhang ◽  
Bin Hua ◽  
Jie Yang ◽  
Bo Chi ◽  
Jian Pu ◽  
...  
Keyword(s):  
Performance Evaluation ◽  
Fuel Cells ◽  
Solid Oxide Fuel Cells ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Reducing Atmosphere

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.

scholarly journals Structural and morphological analysis of barium cerate electrolyte for SOFC application

2017 ◽  
Vol 35 (1) ◽  
pp. 120-125 ◽  
Author(s):  
A. Senthil Kumar ◽  
R. Balaji ◽  
P. Puviarasu ◽  
S. Jayakumar
Keyword(s):  
Fuel Cells ◽  
Solid Oxide Fuel Cells ◽  
Sintering Temperature ◽  
Perovskite Phase ◽  
Xrd Analysis ◽  
Good Choice ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Barium Cerate ◽  
Scanning Calorimetry

AbstractGadolinium doped barium cerate (BCG) electrolytes Ce0.8Gd0.2O1.9 + xBaO (x = 0.1 and 0.4) were prepared by wet chemical method for the use in solid oxide fuel cells operating at intermediate temperatures (600 °C to 800 °C). The as-prepared powder sample was calcined at 900 °C. The calcination temperature was identified using differential scanning calorimetry (DSC) analysis. The orthorhombic perovskite phase formation was confirmed by XRD analysis. From TEM results, the particle size was found to be about 32 nm which is in a good agreement with XRD results. BCG nanoparticles were formed at lower sintering temperature due to using microwave furnace. By reducing the sintering temperature of solid electrolyte through microwave technique, the percentage of barium loss was successfully reduced and the prepared electrolyte can be a good choice for solid oxide fuel cells operating at intermediate temperatures.

The Investigation of Perovskite LaCo0.6Ni0.4O3-δ as Cathode Interface Contact Material for Intermediate Temperature Solid Oxide Fuel Cells

2017 ◽  
Vol 726 ◽  
pp. 240-244 ◽  
Author(s):  
Zhe Li ◽  
Dong Yan ◽  
Qian Zhang ◽  
Jian Pu
Keyword(s):  
Fuel Cells ◽  
Solid Oxide Fuel Cells ◽  
Specific Resistance ◽  
Perovskite Phase ◽  
Solid Oxide ◽  
Intermediate Temperature ◽  
Oxide Fuel ◽  
Contact Material ◽  
Interface Contact ◽  
Precursor Route

The goal of this study is to identify LaCo0.6Ni0.4O3-δ (LCN) as reliable cathode contact material for intermediate temperature solid oxide fuel cells (SOFC). LCN was prepared through the polymeric steric entrapment precursor route and calcined at 800 °C which shows single perovskite phase. Area specific resistance (ASR) of LCN was measured at 750 °C. The investigation shows that the ASR can be maintained about 50 mΩ·cm2 for 100 hours operation, and presented ASR stability within 10th thermal cycles. The excellent performance of LCN is attributed to good interface adhesion between LCN and interconnect alloy.

Effect of Co doping on the properties of Sr0.8Ce0.2MnO3−δ cathode for intermediate-temperature solid-oxide fuel cells

2008 ◽  
Vol 33 (17) ◽  
pp. 4681-4688 ◽  
Author(s):  
Haitao Gu ◽  
Han Chen ◽  
Ling Gao ◽  
Yifeng Zheng ◽  
Xiaofang Zhu ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Solid Oxide Fuel Cells ◽  
Solid Oxide ◽  
Intermediate Temperature ◽  
Oxide Fuel ◽  
Co Doping
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