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February 25, 2026Chemical Communications1 citationsOpen Access

Quantifying static capacity losses in solid-state battery composites via coulometric titration comparison

KVKilian VettoriJustus-Liebig-Universität Gießen MKMaximilian KisselJustus-Liebig-Universität Gießen DWDaniel WagnerJustus-Liebig-Universität Gießen

Key Points

This research aims to measure the fraction of electrochemically active mass in solid-state battery composites using a new electrochemical method.
Comparison of coulometric titration curves between solid and liquid electrolyte cells
Utilization of in situ measurements to assess static CAM utilization
Contrast with an ex situ method based on X-ray diffraction for validation.
Identified differences in static CAM utilization between solid-state and liquid electrolyte batteries
Demonstrated that coulometric titration effectively quantifies static capacity losses
Validated findings through comparison with X-ray diffraction results.

Abstract

An electrochemical method is discussed to quantify in situ the static CAM utilization, i.e., the fraction of electrochemically active mass in solid-state battery composite cathodes. For that, coulometric titration curves of the same active material in cells with solid and liquid electrolytes are compared. The results are contrasted with an ex situ method based on X-ray diffraction.

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