Assessing Shear-Induced Structural and Electrical Changes in Battery Slurries by Rheo-Impedance Measurements
The performance and manufacturability of lithium-ion battery electrodes are strongly influenced by the properties of the precursor slurry.
The slurries must provide high specific capacity, strong adhesion, mechanical stability, and reliable electrical conductivity to ensure consistent coating quality and optimal battery performance. Slurry formulation and mixing processes therefore play a critical role not only in production efficiency but also in determining the final electrochemical properties of the electrode. Conventional rheological measurements describe flow behavior and structural stability during mixing and coating; however, they do not directly reveal the formation and stability of electrically conductive networks within the slurry.
In this work, rheology was combined with impedance (dielectric) spectroscopy in a simultaneous measurement approach to directly correlate mechanical structuring with electrical percolation behavior under processing-relevant shear conditions.
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