کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1293357 973545 2011 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A corrugated mesoscale structure on electrode–electrolyte interface for enhancing cell performance in anode-supported SOFC
موضوعات مرتبط
مهندسی و علوم پایه شیمی الکتروشیمی
پیش نمایش صفحه اول مقاله
A corrugated mesoscale structure on electrode–electrolyte interface for enhancing cell performance in anode-supported SOFC
چکیده انگلیسی

For enhancing the power density of a solid oxide fuel cell, mesoscale-structure control of electrode–electrolyte interfaces in an anode-supported cell is proposed. We define ‘mesoscale’ as a size range of the order of 10–100 μm which is larger than the ‘microscale’ of electrode particles but smaller than the ‘macroscale’ of cell geometries. Mesoscale-structure control enlarges the electrode–electrolyte interface, and this enlargement extends an active electrochemical reaction zone where a charge-transfer reaction occurs actively near the interface. A corrugated mesoscale electrolyte was adopted which enlarged the interface structures of both anode and cathode sides. We performed a 2-D numerical simulation, and discussed the effects of such structure not only on the overall performance but also on the detailed distributions of electric potentials, gas concentrations and local electrochemical reaction rate. As a result, it was observed that the corrugated mesoscale structure reduced both activation overpotential and ohmic loss by ion transport, and hence enhanced the power generation performance. When the interface area enlargement factor was 1.73, an enhancement of a power density having a maximum value of 59% was achieved with the mesoscale-corrugated cell rather than with the flat cell.


► We performed 2-D simulations of anode-supported cell with corrugated interfaces.
► Effects of electrode–electrolyte interface in mesoscale are numerically investigated.
► The cell performance is enhanced by applying corrugated structure of interfaces.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Power Sources - Volume 196, Issue 18, 15 September 2011, Pages 7442–7449
نویسندگان
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