Ammonia as a Direct Fuel for Solid Oxide Fuel Cells: Long-Term Testing and Durability Analysis
DONG WOO JOH a, MIAN MUNEEB UR REHMAN a, AMJAD HUSSAIN a, TAE-HUN KIM a, JI-WEON SHIN a, JON-EUN HONG a, AK-HYOUNG LIM a, RAK-HYUN SONG a
a Fuel Cell Laboratory, Korea Institute of Energy Research, Daejeon 34129, Republic of Korea.
Proceedings of 24th International Conference on Solid State Ionics (SSI24)
Fundamentals: Experiment and simulation
London, United Kingdom, 2024 July 14th - 19th
Organizers: John Kilner and Stephen Skinner
Poster, DONG WOO JOH, 614
Publication date: 10th April 2024

Solid Oxide Fuel Cells (SOFCs) are capable of converting the chemical energy of various fuels, including hydrogen and hydrocarbons, into electrical energy through electrochemical reactions, facilitated by their high operating temperatures. Recently, ammonia has emerged as a promising candidate for SOFCs due to its potential as a hydrogen carrier and its status as a carbon-free fuel. While there is potential to directly utilize ammonia as a fuel to achieve efficient and clean power generation in SOFCs, concerns have been raised regarding the degradation of cell/stack components during electrochemical reactions in high-temperature ammonia environments. In this study, long-term tests were conducted using ammonia as a direct fuel, analyzing the causes of degradation over time and considering approaches to enhance durability. Cells were subjected to durability assessments using ammonia gas and similar mixed gases (N2+H2) alternately, showing approximately 9% degradation after over 250 hours of testing. Post-test analysis, including examination of the cell's microstructure, was conducted to understand the degradation phenomena.

This work was supported by the National Research Foundation (NRF) funded by the Ministry of Science and ICT (Grant number 2022M3H4A1A04076616).

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