Operation Characteristics of Tubular Segmented-In-Series Solid Oxide Fuel Cells (SOFC)

2019 ◽  
Vol 35 (1) ◽  
pp. 679-682
Author(s):  
Tak-Hyoung Lim ◽  
U. J. Yun ◽  
Jong-Won Lee ◽  
Seung-Bok Lee ◽  
Seok-Joo Park ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Solid Oxide Fuel Cells ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
In Series ◽  
Operation Characteristics

scholarly journals Development of Segmented-in-series-type Solid Oxide Fuel Cells for Residential Applications

2012 ◽  
Vol 28 ◽  
pp. 153-161 ◽  
Author(s):  
K. Fujita ◽  
T. Seyama ◽  
T. Sobue ◽  
Y. Matsuzaki
Keyword(s):  
Fuel Cells ◽  
Solid Oxide Fuel Cells ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
In Series ◽  
Series Type

Fabrication and Performance of Cone-Shaped Segmented-In-Series Solid Oxide Fuel Cells

2008 ◽  
Vol 5 (6) ◽  
pp. 568-573 ◽  
Author(s):  
Yaohui Zhang ◽  
Jiang Liu ◽  
Juan Yin ◽  
Wensheng Yuan ◽  
Jing Sui
Keyword(s):  
Fuel Cells ◽  
Solid Oxide Fuel Cells ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
In Series ◽  
And Performance

Increase in Availability of Solid Oxide Fuel Cells by Means of Parallel Connection of Cells

2012 ◽  
Vol 9 (3) ◽  
Author(s):  
Hanno Stagge ◽  
Lars Doerrer ◽  
Ralf Benger ◽  
Beck Hans-Peter
Keyword(s):  
Fuel Cells ◽  
Solid Oxide Fuel Cells ◽  
Single Cell ◽  
Single Cells ◽  
Electric Energy ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Parallel Connection ◽  
In Series ◽  
Storage Technologies

Fuel cells consist of single cells that are connected in series to form a stack. This increases output voltage and therefore decreases current-dependent power losses, but the electric current of the stack has to flow through each single cell. In case of an increase of resistance or a failure of just one single cell the whole stack is affected. The failure tolerance of a parallel connection is higher. The serial and parallel connection of single solid oxide fuel cells (SOFC) is compared under the aspects of failure probability, power drop and stress on the single cells. With both a highly linearized and a complex SOFC model simulations have been accomplished of the connection of two single cells in parallel and in serial configuration. Additionally different connection concepts of 16 single cells were examined. Finally, an outlook on different other source or storage technologies for electric energy like batteries and photovoltaic cells is given.

LSM Protective Coatings on Stainless Steel as Interconnects for Solid Oxide Fuel Cells

2014 ◽  
Vol 1644 ◽  
Author(s):  
Ryan Eriksen ◽  
Srikanth Gopalan ◽  
Sanjay Sampath ◽  
Yikai Chen
Keyword(s):  
Stainless Steel ◽  
Fuel Cells ◽  
Solid Oxide Fuel Cells ◽  
High Temperatures ◽  
Active Sites ◽  
Protective Coatings ◽  
Cost Effective ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
In Series

ABSTRACTOne of the major barriers to the adoption of solid oxide fuel cells (SOFCs) is the short lifetime of the fuel cell stacks. A stack consists of a number of cells in series separated by an interconnect. Due to the high temperatures necessary for SOFCs, typical commercial interconnects are ceramic. Great attention has been paid to decreasing the operating temperature of SOFCs in order to extend the life and decrease the cost of the stack. As operating temperatures decrease below 1000°C, alternative interconnect materials become viable. Stainless steel interconnects are more cost effective than ceramic interconnects but the high temperatures and the oxidizing environment of the cathode leads to the formation of a chromium oxide scale that increases the stack resistance. Chromium from the stainless steel can also enter the vapor phase and redeposit on the cathode thereby blocking the electrochemically active sites. One method to neutralize these effects is to coat the metallic interconnect in a ceramic such as La.8Sr.2MnO3 (LSM). The coating acts as a diffusion barrier both against chromium diffusing into the cathode and oxygen diffusing into the interconnect. In this study LSM has been deposited using plasma spray and tested in a dual atmosphere setup using impedance spectroscopy to analyze the performance of the coatings at various temperatures. The area specific resistance and chemical composition of the scale was examined in order to determine the affect of the LSM coating.

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.

Analysis of Impedance Spectra for Segmented-in-Series Tubular Solid Oxide Fuel Cells

2010 ◽  
Vol 157 (12) ◽  
pp. B1858 ◽  
Author(s):  
Bin Liu ◽  
Hiroki Muroyama ◽  
Toshiaki Matsui ◽  
Kazuo Tomida ◽  
Tatsuo Kabata ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Solid Oxide Fuel Cells ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Impedance Spectra ◽  
In Series

Impedance Analysis of Practical Segmented-in-Series Tubular Solid Oxide Fuel Cells

2019 ◽  
Vol 35 (1) ◽  
pp. 637-646 ◽  
Author(s):  
Bin Liu ◽  
Toshiaki Matsui ◽  
Hiroki Muroyama ◽  
Kazuo Tomida ◽  
Tatsuo Kabata ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Solid Oxide Fuel Cells ◽  
Impedance Analysis ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
In Series
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