Title

Silver (Ag) as Anode and Cathode Current Collectors in High Temperature Planar Solid Oxide Fuel Cells

Abstract

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.

Department(s)

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)

0360-3199

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2011 Professor T. Nejat Veziroglu, All rights reserved.

Publication Date

01 Jan 2011

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