Real-time Evaluation of Battery Electrode Slurry Coating Conditions via Rheo-impedance Spectroscopy

A research group led by Associate Professor Isao Shitanda at Tokyo University of Science developed a rapid evaluation method for electrode slurry using rheo-impedance spectroscopy. This technique enables the determination of optimal coating conditions with less than 1 mL of sample in under 5 minutes. The study identified a clear inverse correlation between slurry resistance and final electrode resistance, allowing researchers to predict battery performance before cell assembly. This breakthrough significantly improves R&D efficiency and resource conservation in lithium-ion battery manufacturing.