BiFeO3/YSZ bilayer electrolyte for low temperature solid oxide fuel cell

Highly crystalline perovskite BiFeO3 is obtained by a facile solution method. We have reported that the YSZ/BFO electrolyte with 17 μm/30 μm thickness, respectively, showed a maximum power density of 165 mW cm−2 and open-circuit voltage of 0.75 V at 650 °C.

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Influence of Hydrogen Sulfide in Fuel on Electric Power of Solid Oxide Fuel Cell

Materials Science Forum ◽

10.4028/www.scientific.net/msf.544-545.997 ◽

2007 ◽

Vol 544-545 ◽

pp. 997-1000 ◽

Cited By ~ 4

Author(s):

Minako Nagamori ◽

Yoshihiro Hirata ◽

Soichiro Sameshima

Keyword(s):

Fuel Cell ◽

Solid Oxide Fuel Cell ◽

Electric Power ◽

Power Density ◽

Open Circuit Voltage ◽

Open Circuit ◽

Solid Oxide ◽

Oxide Fuel ◽

Terminal Voltage ◽

Ceria Electrolyte

Terminal voltage, electric power density and overpotential were measured for the solid oxide fuel cell with gadolinium-doped ceria electrolyte (Ce0.8Gd0.2O1.9, GDC), 30 vol% Ni-GDC anode and Pt cathode using a H2 fuel or biogas (CH4 47, CO2 31, H2 19 vol %) at 1073 K. Addition of 1 ppm H2S in the 3vol % H2O-containing H2 fuel gave no change in the open circuit voltage (0.79 - 0.80 V) and the maximum power density (65 - 72 mW/cm2). Furthermore, no reaction between H2S and Ni in the anode was suggested by the thermodynamic calculation. On the other hand, the terminal voltage and electric power density decreased when 1 ppm H2S gas was mixed with the biogas. After the biogas with 1 ppm H2S flowed into the anode for 8 h, the electric power density decreased from 125 to 90 mW/cm2. The reduced electric power density was also recovered by passing 3 vol % H2O-containing H2 fuel for 2 h.

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Effect of Short Current on the Open Circuit Voltage in a Solid Oxide Fuel Cell

ECS Meeting Abstracts ◽

10.1149/ma2019-01/32/1692 ◽

2019 ◽

Keyword(s):

Fuel Cell ◽

Solid Oxide Fuel Cell ◽

Open Circuit Voltage ◽

Open Circuit ◽

Solid Oxide ◽

Oxide Fuel

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Evaluation of Electric Power of SOFC Using Reformed Biogas

Materials Science Forum ◽

10.4028/www.scientific.net/msf.761.11 ◽

2013 ◽

Vol 761 ◽

pp. 11-14 ◽

Cited By ~ 3

Author(s):

Naoki Furukawa ◽

Yoshihiro Hirata ◽

Soichiro Sameshima ◽

Naoki Matsunaga

Keyword(s):

Fuel Cell ◽

Solid Oxide Fuel Cell ◽

Electric Power ◽

Open Circuit Voltage ◽

Carbon Deposition ◽

Open Circuit ◽

Solid Oxide ◽

Mixed Conductor ◽

Oxide Fuel ◽

Waste Food

Biogas of about 60 % CH4 -40% CO2 composition is produced from waste food or drainage. Electrochemical reforming of CH4 with CO2 using a porous gadolinium-doped ceria (GDC) cell is an attractive process to produce a H2-CO fuel used in solid oxide fuel cell. The supplied CO2 is converted to CO and O2- ions by the reaction with electrons at cathode (CO2 + 2e- → CO + O2-). The produced CO and O2- ions are transported to the anode through a porous mixed conductor GDC electrolyte. In the anode CH4 reacts with O2- ions to produce CO, H2 and electrons (CH4 + O2- → CO + 2H2 + 2e-). This process suppresses the carbon deposition from CH4. The formed H2 and CO fuels were supplied to a solid oxide fuel cell with dense GDC electrolyte (Ce0.8Gd0.2O1.9). The open circuit voltage and maximum power density were measured for the reformed gas and for a pure H2 fuel. Little difference in the electric power was measured at 1073 K for both the fuels.

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NiO-SDC Powder for Solid Oxide Fuel Cell Anode Applications by Buffer Solution Method

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.336-338.440 ◽

2007 ◽

Vol 336-338 ◽

pp. 440-443 ◽

Cited By ~ 1

Author(s):

Ji Gui Cheng ◽

Li Ping Deng ◽

Er Tao Xiong ◽

Ping Shi

Keyword(s):

Fuel Cell ◽

Solid Oxide Fuel Cell ◽

Solution Method ◽

Open Circuit ◽

Solid Oxide ◽

Precipitation Method ◽

Oxide Fuel ◽

Buffer Solution ◽

Composite Powders ◽

Microstructure Observation

NiO-Samaria-Doped-Ceria (NiO-SDC) composite powders with nanometer particle size were synthesized by an improved co-precipitation method, called the buffer solution method. NiO/SDC ceramics were then prepared from the NiO-SDC composite powders and were converted into Ni/SDC cermets, which were tested as the anode materials for solid oxide fuel cell (SOFC) with SDC electrolytes. Microstructure observation showed that the NiO/SDC ceramics and Ni/SDC cermets fabricated from the NiO-SDC composite powders have more uniform and finer grain and pore size than those prepared from the mechanically mixed NiO-SDC powders, and the resulting Ni/SDC cermets also showed higher electrical conductivity than those of Ni/SDC cermets from the mechanically mixed NiO-SDC powders. Furthermore, SOFC based on the buffer solution Ni/SDC anodes exhibited higher open circuit voltage (OCV) and maximum power density.

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