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SAMARIUM-BASED INTERMEDIATE TEMPERATURE SOLID OXIDE FUEL CELLS

Guzman Montanez, Felipe
http://rave.ohiolink.edu/etdc/view?acc_num=akron1134056820

Abstract Details

2005, Master of Science, University of Akron, Chemical Engineering.
The development of electrochemical converters (i.e. fuel cells) has attracted research interest during the last decades due to an increasing concern on the depletion of available fossil fuel reserves and environmental issues such as global warming and emission of pollutant gases. Solid oxide fuel cells have received special attention because of their higher energy efficiency, rapid electrode kinetics without using expensive electrocatalysts such as Pt, relative resistance to impurities in the fuel and the possibility of processing CO, CH4 and other Carbon based fuels. Extensive research efforts have resulted in the development of solid oxide fuel cell materials such as Yttria stabilized Zirconia (YSZ) electrolytes, Lanthanum or Calcium doped Strontium Manganite (LSM) cathodes and Ni-YSZ cermet anodes. YSZ electrolytes require high operation temperatures (~ 1000 °C) in order to achieve sufficient ionic conductivity, placing large restrictions to candidate electrode, interconnect and housing materials. As a result, the cost of solid oxide fuel cell systems has become an important factor preventing their commercialization. Recent research efforts have shown that a variety of samarium doped oxides can be used as electrolyte and electrode materials in order to develop solid oxide fuel cells operating in intermediate temperatures. Samarium doped Ceria (SDC) has been shown to possess sufficient ionic conductivity at intermediate temperatures (600-800 °C). iv Similarly, Strontium doped Samarium Cobaltite (SSC) has been shown to act as an active electrode material. During this study we developed a synthesis procedure in order to fabricate a samarium doped ceria electrolyte and a samarium strontium cobaltite electrode material. Different fabrication conditions were tested in order to elucidate a procedure to manufacture an intermediate temperature fuel cell using an SDC electrolyte and two SSC electrodes. The impact of several fabrication variables on the resulting fuel cell performance was evaluated. Results from this study concluded that SDC electrolyte materials can be successfully synthesized according to the pechini method. Similarly, SSC electrodes can be synthesized using a solid state reaction starting with respective oxide species. Fabrication of electrolyte supported fuel cells using an SDC electrolyte and two SSC were also developed according to a cold pressing technique. The effect of the solid electrolyte fabrication procedure on the fuel cell performance was also evaluated.
Steven Chuang (Advisor)
115 p.
Engineering, Chemical
INTERMEDIATE TEMPERATURE FUEL CELL; SDC; SSC; RAMAN; XRD; SEM; CATALYSIS; SSC ELCTRODES.

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Citations

  • Guzman Montanez, F. (2005). SAMARIUM-BASED INTERMEDIATE TEMPERATURE SOLID OXIDE FUEL CELLS [Master's thesis, University of Akron]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=akron1134056820

    APA Style (7th edition)

  • Guzman Montanez, Felipe. SAMARIUM-BASED INTERMEDIATE TEMPERATURE SOLID OXIDE FUEL CELLS. 2005. University of Akron, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=akron1134056820.

    MLA Style (8th edition)

  • Guzman Montanez, Felipe. "SAMARIUM-BASED INTERMEDIATE TEMPERATURE SOLID OXIDE FUEL CELLS." Master's thesis, University of Akron, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=akron1134056820

    Chicago Manual of Style (17th edition)

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© 2005, all rights reserved.
This open access ETD is published by University of Akron and OhioLINK.