Development of functional SOFC anode

J. Mukhopadhyay*, M. Banerjee, A. Das Sharma, R. N. Basu, H. S. Maiti

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

For anode-supported planar SOFC, the most widely accepted anode material is nickel-8mol% yttria stabilized zirconia (Ni-YSZ) cermet For the required electrical conductivity during intermediate temperature SOFC operation (∼ 800°C), conventionally 35-40vol.% Ni is used. Reduction of nickel content not only solves nickel coarsening problem during long-term SOFC operation but also makes thermal expansion coefficient much closer to YSZ. In this investigation, a novel electroless technique is employed to prepare uniform coating of metallic Ni onto YSZ to make core-shell anode cermet structure. Compared to conventionally prepared anodes (∼ 35vol.% Ni), in this functional anode, percolation threshold is lowered down to ° 20vol.% to achieve almost same electrical conductivity (σ800°C ∼ 150 S cm-1). However, the properties of these cermets depend strongly on several processing conditions like particle size of YSZ powders, sensitization process, electroless bath composition and deposition temperature. A simple adsorption kinetic model for sensitization process is proposed.

Original languageEnglish
Title of host publicationECS Transactions - 10th International Symposium on Solid Oxide Fuel Cells, SOFC-X
Pages1563-1572
Number of pages10
Edition1 PART 2
DOIs
Publication statusPublished - 2007
Event10th International Symposium on Solid Oxide Fuel Cells, SOFC-X - , Japan
Duration: 3 Jun 20078 Jun 2007

Publication series

NameECS Transactions
Number1 PART 2
Volume7
ISSN (Print)1938-5862
ISSN (Electronic)1938-6737

Conference

Conference10th International Symposium on Solid Oxide Fuel Cells, SOFC-X
Country/TerritoryJapan
Period3/06/078/06/07

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