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Advanced electrolyte-free fuel cells based on functional nanocomposites of a single porous component: analysis, modeling and validation
KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Heat and Power Technology.
KTH, School of Industrial Engineering and Management (ITM), Energy Technology.
KTH, School of Industrial Engineering and Management (ITM), Energy Technology.
KTH, School of Industrial Engineering and Management (ITM), Energy Technology.
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2012 (English)In: RSC Advances, ISSN 2046-2069, Vol. 2, no 21, 8036-8040 p.Article in journal (Refereed) Published
Abstract [en]

Recently, a fuel cell device constructed with only one layer composited of ceria-based nanocomposites (typically, lithium nickel oxide and gadolinium doped ceria (LiNiO2-GDC) composite materials), called an electrolyte-free fuel cell (EFFC), was realized for energy conversion by Zhu et al. The maxium power density of this single-component fuel cell is 450 mW cm(-2) at 550 degrees C when using hydrogen fuel. In this study, a model was developed to evaluate the performance of an EFFC. The kinetics of anodic and cathodic reactions were modeled based on electrochemical impedance spectroscopy (EIS) measurements. The results show that both of the anodic and cathodic reactions are kinetically fast processes at 500 degrees C. Safety issues of an EFFC using oxidant and fuels at the same time without a gas-tight separator were analyzed under open circuit and normal operation states, respectively. The reaction depth of anodic and cathodic processes dominated the competition between surface electrochemical and gas-phase reactions which were effected by the catalytic activity and porosity of the materials. The voltage and power output of an EFFC were calculated based on the model and compared with the experimental results.

Place, publisher, year, edition, pages
2012. Vol. 2, no 21, 8036-8040 p.
Keyword [en]
Chamber Sofcs, Air Mixtures, Performance, Conductors, Film
National Category
Energy Engineering
Identifiers
URN: urn:nbn:se:kth:diva-102655DOI: 10.1039/c2ra20694cISI: 000307792200018Scopus ID: 2-s2.0-84871050591OAI: oai:DiVA.org:kth-102655DiVA: diva2:556099
Funder
VinnovaSwedish Research Council, 621-2011-4983
Note

QC 20120924

Available from: 2012-09-24 Created: 2012-09-21 Last updated: 2012-09-24Bibliographically approved

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