Use of Electroless Anode Active Layer in Anode-supported Planar SOFC

Abstract

In SOFC, a novel Ni-YSZ cermet developed through electroless technique is used as an anode as well as anode active layer (AAL). In the present investigation, thickness of such AAL (varied in the range 15 - 140 micrometer) is optimized sequentially for fabricating high performance single cell. The fabrication technique involves tape casting followed by room temperature lamination to form the half cells. Effect of sintering temperature of half cells on the electrochemical performance has been carried out in the range of 1300 degC to 1400 degC. A typical I-V characteristics of coupon cell (active area of ~ 0.3 cm²) sintered at 1400 degC with an optimum AAL thickness show current density of ~ 3 A/cm² and power density of ~ 2 W/cm² at 0.7 V and 800 degC. Electrochemical performances of single cells using only electroless anode are also evaluated for comparison. Microstructures of these single cells are correlated with the electrochemical performances.

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Identifiers

DOI

10.1149/1.3205777

Journal

ECS Transactions

Year

2009