Publication date: 15th December 2025
Developing next-generation electrochemical storage and conversion devices with superior performance and longevity requires a fundamental understanding of electrochemical processes at the nanoscale. Our group employs a multimodal approach utilizing in-situ electron microscopy to unravel the dynamic processes governing energy materials, including batteries, solid oxide cells [1]. This presentation highlights our capabilities in characterizing dynamics at solid-solid, solid-gas, and solid-liquid interfaces.
Regarding solid-solid interfaces, we examined lithiation/delithiation dynamics in coated and uncoated silicon particles [2], [3]. These insights are critical for understanding failure mechanisms in all-solid-state batteries and establishing protocols to evaluate coating material architectures.
We investigated gas-solid interactions to decipher catalyst and fuel electrode behavior under operational conditions [4]. These studies reveal catalyst exsolution mechanisms in solid oxide cells and catalyst behavior during CO2 conversion. When coupled with FIB-SEM tomography, these findings link long-term microstructural evolution to electrode design.
Finally, I will present pioneering in-situ liquid phase TEM studies of solid-liquid interactions [5],[6]. We have developed a novel liquid purging method that dynamically controls liquid thickness, enabling high-resolution imaging and analytical studies under realistic flow conditions. We utilize this method to investigate zinc battery dynamics, aiming to optimize charge-discharge routines and electrolyte additives.
By directly visualizing these processes, we gain crucial insights that guide the development of next-generation energy technologies.
Authors acknowledge the funding provided by the BMBF (German Research Foundation) through the project DERIEL (03HY122C).
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