BI-LAYER p-n JUNCTION INTERCONNECTIONS FOR COAL BASED SOLID OXIDE FUEL CELLS

Gopalan, Srikanth

Trustees of Boston University (United States)

关键词: 30 Direct Energy Conversion;    Partial Pressure;    Oxygen;    01 Coal, Lignite, And Peat;    Current Density;   

DOI  :  10.2172/841139
RP-ID  :  NONE
RP-ID  :  FG26-03NT41800
RP-ID  :  841139

美国|英语

来源: UNT Digital Library

【 摘 要 】

In this report, a new approach for lower operating temperature solid oxide fuel cells (SOFCs) interconnections (IC) consisting of a bi-layer structure is proposed and analyzed. The bi-layer structure consists of a p-type layer exposed to cathodic gas (air/oxygen) and an n-type layer exposed to anodic gas (fuel). It is theoretically shown that the interfacial oxygen partial pressure which is an important design variable, is dependent primarily on the oxygen partial pressure gradient across the IC, the low level oxygen conductivities of the two layers and is largely independent of their electronic conductivities and the total current density through the IC material. Experimental difficulties in fabricating bi-layer structures are presently being addressed.