Quantifying the Impact of Cathode Composite Mixing Quality on Active Mass Utilization and Reproducibility of Solid‐State Battery Cells

Maximilian Kissel; Marie Schosland; Julia Töws; Daizy Kalita; Yannik Schneider; Jill Kessler‐Kühn; Steffen Schröder; Johannes Schubert; Finn Frankenberg; Arno Kwade; Anja Bielefeld; Felix H. Richter; Jürgen Janek

doi:10.1002/aenm.202405405

journal article Open Access Apr 01, 2025

Quantifying the Impact of Cathode Composite Mixing Quality on Active Mass Utilization and Reproducibility of Solid‐State Battery Cells

Marie Schosland Julia Töws Daizy Kalita Yannik Schneider Jill Kessler‐Kühn Steffen Schröder Johannes Schubert Finn Frankenberg

Advanced Energy Materials Vol. 15 No. 27 · Wiley

View at Publisher Save 10.1002/aenm.202405405

Abstract

AbstractResearch into the development and understanding of solid‐state batteries often relies on pelletized press cells due to their comparative ease of use. However, these model cells are prone to comparability and reproducibility issues. This study examines the extent to which the cathode composite preparation influences the cell performance of a reference system comprising LiNi0.82Mn0.07Co0.11O2 as the cathode active material, Li6PS5Cl as the solid electrolyte, carbon nanofibers as the conductive additive, and an indium–lithium foil anode. The cathode composite is prepared either via hand mortaring or in a mini vibrating mill. The mixing process is found to be critical for the reproducibility of cell performance and accounts for many of the discrepancies observed in the capacities of different cells made with identical materials and following the same cell assembly protocol. The open‐circuit relaxation method is implemented to quantify active mass utilization in the cathode in situ, which depends on the mixing process and correlates with the cell performance. This approach allows for a quantitative differentiation between static and kinetic capacity losses during the discussion of specific capacity values. The results demonstrate the significance of cathode composite mixing and the necessity of quantifying the mixing quality for reliable electrochemical data acquisition and interpretation.

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Details

Published: Apr 01, 2025
Vol/Issue: 15(27)
License: View

Authors

M

Maximilian Kissel

Institute of Physical Chemistry Justus‐Liebig‐University Giessen Heinrich‐Buff‐Ring 17 35392 Giessen Germany; Center for Materials Research (ZfM/LaMa) Justus‐Liebig‐University Giessen Heinrich‐Buff‐Ring 16 35392 Giessen Germany

M

Marie Schosland

Institute of Physical Chemistry Justus‐Liebig‐University Giessen Heinrich‐Buff‐Ring 17 35392 Giessen Germany; Center for Materials Research (ZfM/LaMa) Justus‐Liebig‐University Giessen Heinrich‐Buff‐Ring 16 35392 Giessen Germany

J

Julia Töws

Institute of Physical Chemistry Justus‐Liebig‐University Giessen Heinrich‐Buff‐Ring 17 35392 Giessen Germany; Center for Materials Research (ZfM/LaMa) Justus‐Liebig‐University Giessen Heinrich‐Buff‐Ring 16 35392 Giessen Germany

D

Daizy Kalita

Institute of Physical Chemistry Justus‐Liebig‐University Giessen Heinrich‐Buff‐Ring 17 35392 Giessen Germany; Center for Materials Research (ZfM/LaMa) Justus‐Liebig‐University Giessen Heinrich‐Buff‐Ring 16 35392 Giessen Germany

Y

Yannik Schneider

Institute of Physical Chemistry Justus‐Liebig‐University Giessen Heinrich‐Buff‐Ring 17 35392 Giessen Germany; Center for Materials Research (ZfM/LaMa) Justus‐Liebig‐University Giessen Heinrich‐Buff‐Ring 16 35392 Giessen Germany

J

Jill Kessler‐Kühn

Institute of Physical Chemistry Justus‐Liebig‐University Giessen Heinrich‐Buff‐Ring 17 35392 Giessen Germany; Center for Materials Research (ZfM/LaMa) Justus‐Liebig‐University Giessen Heinrich‐Buff‐Ring 16 35392 Giessen Germany

S

Steffen Schröder

Institute of Physical Chemistry Justus‐Liebig‐University Giessen Heinrich‐Buff‐Ring 17 35392 Giessen Germany; Center for Materials Research (ZfM/LaMa) Justus‐Liebig‐University Giessen Heinrich‐Buff‐Ring 16 35392 Giessen Germany

J

Johannes Schubert

Institute of Physical Chemistry Justus‐Liebig‐University Giessen Heinrich‐Buff‐Ring 17 35392 Giessen Germany; Center for Materials Research (ZfM/LaMa) Justus‐Liebig‐University Giessen Heinrich‐Buff‐Ring 16 35392 Giessen Germany

F

Finn Frankenberg

Institute for Particle Technology Volkmaroder Straße 5 38104 Braunschweig Germany

A

Arno Kwade

Institute for Particle Technology Volkmaroder Straße 5 38104 Braunschweig Germany

A

Anja Bielefeld

Institute of Physical Chemistry Justus‐Liebig‐University Giessen Heinrich‐Buff‐Ring 17 35392 Giessen Germany; Center for Materials Research (ZfM/LaMa) Justus‐Liebig‐University Giessen Heinrich‐Buff‐Ring 16 35392 Giessen Germany

F

Felix H. Richter

Institute of Physical Chemistry Justus‐Liebig‐University Giessen Heinrich‐Buff‐Ring 17 35392 Giessen Germany; Center for Materials Research (ZfM/LaMa) Justus‐Liebig‐University Giessen Heinrich‐Buff‐Ring 16 35392 Giessen Germany

J

Jürgen Janek

Institute of Physical Chemistry Justus‐Liebig‐University Giessen Heinrich‐Buff‐Ring 17 35392 Giessen Germany; Center for Materials Research (ZfM/LaMa) Justus‐Liebig‐University Giessen Heinrich‐Buff‐Ring 16 35392 Giessen Germany

Funding

Deutsche Forschungsgemeinschaft Award: 462470125

Bundesministerium für Bildung und Forschung Award: 03XP0261

Cite This Article

Maximilian Kissel, Marie Schosland, Julia Töws, et al. (2025). Quantifying the Impact of Cathode Composite Mixing Quality on Active Mass Utilization and Reproducibility of Solid‐State Battery Cells. Advanced Energy Materials, 15(27). https://doi.org/10.1002/aenm.202405405

Quantifying the Impact of Cathode Composite Mixing Quality on Active Mass Utilization and Reproducibility of Solid‐State Battery Cells

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