Low Temperature Performance and Durability of Solid Oxide Fuel Cells with Titanate Based Fuel Electrodes Using Reformate Fuel

J. O. Christensen*, B. R. Sudireddy, A. Hagen

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

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Abstract

The Ni/YSZ composite electrode is conventionally used for solid oxide cells, in electrolysis (SOEC) as well as fuel cell (SOFC) operation. For enhanced electrochemical performance at low temperature, mechanical durability, and impurity tolerance, alternative fuel electrode materials and cell configurations are required. In this paper we have studied a metal supported cell (MSC) with a titanate-based fuel electrode (La0.4Sr0.4Fe0.03Ni0.03Ti0.94O3, LSFNT) for its fuel cell performance using carbon containing fuel and compared to a state of the art (SoA) fuel electrode supported cell with a Ni/YSZ fuel electrode. In hydrogen fuel, the cells showed similar performance at intermediate and low temperatures (750 to 650°C), although the ASR is slightly higher for the MSC at all temperatures and steam/hydrogen ratios. Additionally, the MSC showed fair initial performance in reformate type fuel compositions (CO/steam and CO/steam/hydrogen), i.e. the fuel electrode possesses activity for the water gas shift reaction, which opens the possibility to use such cells with hydrocarbon fuels after a pre-reformer. Durability testing in pre-reformed fuel gas revealed that further fuel electrode tailoring is required to minimize cell degradation in carbon containing fuels.
Original languageEnglish
Article number024515
JournalJournal of The Electrochemical Society
Volume170
Number of pages9
ISSN0013-4651
DOIs
Publication statusPublished - 2023

Bibliographical note

This project has received funding from the Fuel Cells and Hydrogen 2 Joint Undertaking (JU) under grant agreement No 874577, EU NewSOC. The JU receives support from the European Union’s Horizon 2020 research and innovation programme and Denmark, France, Italy, Spain, Poland, Netherlands, Greece, Finland, Estonia, Germany, United Kingdom, Switzerland.

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