Deconvoluting Soecs – One Cell at a Timeinsights from Single-Cell Analysis of Solid Oxide Electrolysis Cells at Topsoe
ECS Meeting Abstracts（2024）
Abstract
The escalating need for sustainable energy solutions has intensified research into Solid Oxide Electrolysis Cells (SOECs), a cornerstone technology in the green transition facilitating the conversion of electricity into green fuels. Topsoe has made significant strides in the field of green technologies, aiming to revolutionize the production of zero-emission fuels and chemicals, thereby contributing to global carbon emission reduction efforts. Topsoe's commitment to leading the carbon emission reduction technologies by 2024 is demonstrated through the development of its advanced SOEC technology. This technology is central to future Power-to-X plants, providing a highly efficient electrolysis solution that complements downstream processes. The upcoming SOEC manufacturing facility in Denmark, anticipated to commence operations in 2025, epitomizes this commitment. The facility is poised to produce electrolysis cells, stacks and modules, aiming for an annual production capacity of 500 MW, with scalability prospects. Topsoe's comprehensive expertise from electrolyzers to various downstream processes enables the transformation of renewable resources into zero-emission products such as green hydrogen, green ammonia, e-Methanol, and eFuels, marking a significant step towards a sustainable future1. The core of the work presented here entails the in-depth analysis facilitated by single-cell studies, both within Topsoe as well in close co-operation with different research institutions. Historical and ongoing research into single-cell testing, dating back several decades, has provided substantial insights into optimizing cell setup and operational parameters. These studies allow for a detailed understanding of individual cell resistance contributions, crucial for deconvoluting the impact of raw materials and manufacturing steps on the full cell performance and durability. The methodological approach includes a spectrum of techniques from in-situ characterization, such as Electrochemical Impedance Spectroscopy (EIS) and current-voltage (IV) curves, to pre- and post-mortem analyses using Scanning Electron Microscopy (SEM), Transmission Electron microscopy (TEM), Raman spectroscopy, and Energy Dispersive X-ray Spectroscopy (EDS) etc. Such detailed single-cell level studies are pivotal in addressing the mechanical and electrochemical performance requirements of SOECs, aiming to map them to stack and system performance. Furthermore, the studies delve into the challenges of scaling up these technologies, emphasizing the importance of stress tests and impurity evaluations to enhance system lifetime and efficiency. 1.www.topsoe.com/hubfs/Investor%20Images/Annual%20Reports/Annual%20report%202023/Topsoe_AR_2023_FINAL.pdf?hsLang=en
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