Lithium-sulfur pouch cells
What is inside these sustainable batteries of the future?
Authors: Rafael Müller and Sebastian Risse
Our project develops and uses multimodal in operando measurement methods to record the complex electrochemical and structural changes in lithium-sulfur pouch cells during operation. The aim is to use this as a basis for developing strategies to improve the performance, service life, and safety of lithium-sulfur batteries.
Li-S Battery component
By combining X-ray diffraction, scattering, and imaging with electrochemical characterization, we gain a deep understanding of reaction mechanisms and degradation processes. This multimodal approach makes it possible to track structural, chemical, and morphological changes in lithium-sulfur pouch cells simultaneously and under realistic operating conditions. This provides a comprehensive picture of cell processes in real time.
Investigations involving pressure and temperature measurements provide insights that are of enormous interest, particularly for industrial manufacturing and commercial use. Together with impedance data, we can describe the health status of batteries. Just like a doctor with an ECG, blood pressure monitor, and thermometer.
Inside a LiS pouch cell. Sulfur crystals, electrode design, and tabs.
Lithium-sulfur batteries promise significantly higher energy density with lower raw material requirements than today's lithium-ion technologies. Our research is helping to bring this more sustainable energy storage technology to market faster – for lighter electric vehicles, longer ranges, and a more environmentally friendly energy supply.
Through close cooperation with German companies, we are also strengthening Germany as a technology location and creating innovation impulses for the local economy.