Abstract
<p class="PaperAbstract">A mathematical model is developed to study the leakage current in a solid oxide fuel cell (SOFC) with a bi-layer electrolyte. The model predicts the variation of leakage current and power density with various design and operating factors of SOFC, namely thickness of the bi-layer electrolyte, operating temperature and operating cell voltage. The interfacial oxygen pressure in SOFC is also studied as a function of the thickness of YSZ layer. Modelling results are compared with experimental data and found to compare well.</p>
Highlights
Solid oxide fuel cells (SOFCs) are promising sources of energy due to lack of pollution and high efficiency
Since the conductivity values of gadolinium doped CeO2 (GDC) and SDC are very close [13], we have modelled the polarization curve of a bi-layer electrolyte solid oxide fuel cell (SOFC) using yttria stabilized ZrO2 (YSZ) (318 μm) and SDC (737 μm) at 650 oC
The leakage current is seen to decrease with increasing thickness of YSZ layer at various temperatures and cell voltages
Summary
Solid oxide fuel cells (SOFCs) are promising sources of energy due to lack of pollution and high efficiency.
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