Contact Resistance of Tantalum Coatings in Fuel Cells and Electrolyzers using Acidic Electrolytes at Elevated Temperatures

Annemette Hindhede Jensen, Erik Christensen, Jens H. Von Barner

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Tantalum has so far been found to be the only construction material with sufficient corrosion resistance for high temperature polymer
electrolyte membrane electrolyzers using acidic electrolytes above 100◦C. In this work the interfacial contact resistances of tantalum
plates and tantalum coated stainless steel were found to be far below the US Department of Energy target value of 10mcm2. The
good contact resistance of tantalum was demonstrated by simulating high temperature polymer electrolyte membrane electrolysis
conditions by anodization performed in 85% phosphoric acid at 130◦C, followed by contact resistance measurements. Upon
anodization the contact resistances remained unchanged.
Original languageEnglish
JournalE C S Electrochemistry Letters
Volume3
Issue number7
Pages (from-to)F50-F51
ISSN1099-0062
DOIs
Publication statusPublished - 2014

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