Novel structured electrolytes for solid oxide fuel cells

Date

2012-09-01

Author

TİMURKUTLUK, BORA
Celik, Selahattin
Timurkutluk, Cigdem
Mat, Mahmut D.
Kaplan, Yuksel

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

213
views

0
downloads

Novel grate type electrolytes are designed and fabricated to improve the cell performance and to lower the operation temperature of intermediate temperature electrolyte supported solid oxide fuel cells based on scandium and ceria stabilized zirconia by partly reducing the electrolyte thickness. The characteristics of three different small size cells (11.62 cm(2) active area) having various electrolyte designs are investigated. A standard electrolyte supported cell is also produced as a base case for comparison. Performance measurements showed that all cells having grate type electrolyte produce higher power than that of the base cell due to partly reduced electrolyte thickness. Impedance analysis confirmed that the improvement in the performance is due to the decrease in the electrolyte resistance together with the increased number of active sites. Among the three different designs, Cell C showed the highest power output 14.7 W at 800 degrees C corresponding to 1.26 W cm(-2) power density which is more than twice the base case performance.

Subject Keywords

Solid Oxide Fuel Cell, Scandia Ceria Stabilized Zirconia, Novel Electrolyte

URI

https://hdl.handle.net/11511/68034

Journal

JOURNAL OF POWER SOURCES

DOI

https://doi.org/10.1016/j.jpowsour.2012.04.021

Collections

Unclassified, Article

Suggestions

OpenMETU
Core

Effects of electrolyte pattern on mechanical and electrochemical properties of solid oxide fuel cells TİMURKUTLUK, BORA; Celik, Selahattin; Toros, Serkan; Timurkutluk, Cigdem; Mat, Mahmut D.; Kaplan, Yuksel (2012-09-01) In order to enhance the electrochemical performance and reduce the operation temperature of a conventional electrolyte supported solid oxide fuel cell (SOFC), a three layered electrolyte with various geometry is designed and fabricated. Novel three layered electrolytes comprise a dense and thin scandia alumina stabilized zirconia (ScAlSZ) electrolyte layer sandwiched between two hallow ScAlSZ electrolyte layers each having the same thickness as the support but machined into a filter like architecture in the...
Numerical investigation of a stand alone solar hydrogen energy system effects of PEFC degradation Ender, Ozden; Tarı, İlker (null; 2015-08-12) An existing stand-alone solar energy system producing hydrogen for energy storage is numerically investigated focusing on the degradation of Polymer Electrolyte Fuel Cell (PEFC) and its effects on the overall performance of the system. The system consists of Photovoltaic (PV) panels, polymer electrolyte based electrolyzers, H2 and O2 storage tanks and a commercial PEFC stack. A PEFC is numerically investigated both as new and as degraded (for about two years). Using a variety of observed degradation pattern...
Modeling of a high temperature PEM fuel cell Sezgin, Berna; Eroğlu, İnci; Devrim, Yılser; Department of Chemical Engineering (2016) High temperature polymer electrolyte membrane fuel cells (HT-PEMFC) are considered as the next generation of fuel cells since high temperature operation for PEM fuel cells has several advantages such as single phase operation, high carbon monoxide tolerance, low or zero carbon emission and removal of some equipment from the system. In order to obtain high performances, HT-PEMFC systems should be optimized in terms of dimensions, materials, operating conditions and other parameters. Modeling can help to pre-...
Development of anodes for direct oxidation of methane fuel in solid oxide fuel cells Akdeniz, Yelda; Timurkutluk, Bora; Timurkutluk, Cigdem (2016-06-22) In addition to pure hydrogen, solid oxide fuel cells (SOFCs) can utilize hydrocarbons as a fuel. However, conventional Ni-based anodes exhibit an excellent catalytic activity towards the hydrocarbon cracking reaction and thus the carbon deposition occurs in the anode. The deposited carbons quickly deactivate the anode irreversibly by covering the active surface of the anode catalyst. As a result, a significant degradation in the cell performance can be seen. In this study, the anode structure is modified by...
Numerical modeling of visco-elasto-plastic hygro-thermal stresses and the effects of operating conditions on the mechanical degradation of PEFC membranes Mehrtash, Mehdi; Tarı, İlker; YEŞİLYURT, SERHAT (2018-08-31) Durability of membranes is one of the concerns for widespread commercialization of polymer electrolyte fuel cells. Effects of membrane swelling on the durability pose important challenges for the fabrication of the catalyst-coated membrane. This study provides insight into vulnerable locations of the membrane under hygrothermal loading, mechanical loading due to clamping and realistic conditions where a combination of both of these loadings are imposed. With a half rib-channel model, we simulate a polymer e...

Citation Formats

B. TİMURKUTLUK, S. Celik, C. Timurkutluk, M. D. Mat, and Y. Kaplan, “Novel structured electrolytes for solid oxide fuel cells,” JOURNAL OF POWER SOURCES, pp. 47–54, 2012, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/68034.