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 26.10.2010   Карта сайта     Language По-русски По-английски
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26.10.2010


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Solid State Ionics
Volume 181, Issues 35-36, 9 November 2010, Pages 1568-1576







Analysis of planar solid oxide fuel cells based on proton-conducting electrolyte





Yaneeporn Patcharavorachota, N.P. Brandonb, Woranee Paengjuntuekc, Suttichai Assabumrungrata and Amornchai Arpornwichanopa, low asterisk, E-mail The Corresponding Author






a Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok 10330, Thailand


b Department of Earth Science and Engineering, Imperial College London, London SW7 2AZ, United Kingdom


c Department of Chemical Engineering, Faculty of Engineering, Thammasat University, Patumthani 12120, Thailand





Received 15 April 2009; 


revised 22 July 2010; 


accepted 3 September 2010. 


Available online 5 October 2010.









Abstract



A solid oxide fuel cell based on a proton-conducting electrolyte (SOFC-H+) is an attractive fuel cell technology because of its high theoretical efficiency. This study deals with the performance analysis of a planar SOFC-H+ using a detailed electrochemical model, which takes into account all cell voltage losses, i.e., ohmic, activation, and concentration losses. The Fick's Model was used to explain gas diffusion in porous electrodes. The reliability of the developed SOFC-H+ model was verified by comparison with experimental data reported in the literature. The effects of cell design (e.g., the use of anode, cathode, and electrolyte supports), geometry (e.g., thickness of cell components), and operating parameters (e.g., temperature, pressure, and gas composition) on the electrical characteristics of SOFC-H+ were examined. The results indicate that an anode-supported SOFC-H+ shows the best performance under the operating temperature of 1073 K and pressure of 1 atm. Ohmic loss is the major voltage loss in an anode-supported SOFC-H+ due to the relatively low proton conductivity of the electrolyte. Furthermore, the performance of a SOFC-H+ can be improved by decreasing the thickness of electrolyte and cathode, and the content of water in the oxidant, as well as by increasing the operating temperature and pressure.






Keywords: Planar solid oxide fuel cell; Proton-conducting electrolyte; Electrochemical model; Fick's Model; Performance analysis




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