Silver (Ag) as Anode and Cathode Current Collectors in High Temperature Planar Solid Oxide Fuel Cells
Planar electrolyte supported solid oxide fuel cells were operated at 900 °C with humidified H2 for 200 h using silver mesh and paste for cathode current collection. Continuous potentiostatic tests at 0.7 V appeared to induce migration of Ag towards electrode-electrolyte interphase, while continuous OCV tests caused no mass transport. Similar SOFCs fueled by coal syngas at 850 °C using Ag for both anode and cathode current collection indicated little, if any, Ag migration; providing the possibility of employing Ag for 100 h laboratory scale tests using coal-derived syngas. Use of high temperature steam, carbon dioxide and carbon monoxide did not result in the formation of silver carbonates.
K. C. De Silva et al., "Silver (Ag) as Anode and Cathode Current Collectors in High Temperature Planar Solid Oxide Fuel Cells," International Journal of Hydrogen Energy, vol. 36, no. 1, pp. 779-786, Elsevier Ltd, Jan 2011.
The definitive version is available at https://doi.org/10.1016/j.ijhydene.2010.10.034
Mechanical and Aerospace Engineering
Keywords and Phrases
Coal Syngas; Current Collectors; Silver (Ag); Solid Oxide Fuel Cells (SOFCs); Thermo-Electro Migration
International Standard Serial Number (ISSN)
Article - Journal
© 2011 Professor T. Nejat Veziroglu, All rights reserved.
01 Jan 2011