Optimizing Battery Performance: Critical Steps & Parameters in Cathode and Anode Slurry Manufacturing

Impact of Coating Process on Lithium-Ion Battery Performance

Following coating and drying, the peel strength between the active material and the current collector foil of the electrode is very low. Roller pressing is therefore required to enhance the adhesion strength between the active material and the foil, preventing delamination during electrolyte immersion and battery operation. Additionally, electrode roller pressing compacts the electrode volume, increases cell energy density, reduces porosity within the electrode (between active material, conductive agent, and binder), lowers battery resistance, and improves overall battery performance.

Electrode slitting is a critical process in lithium battery manufacturing. Slit edge burrs serve as a key quality indicator, influenced by numerous factors including the electrode's physical/mechanical properties, thickness, tool lateral pressure, overlap, wear state, bite angle, and disc cutter precision. This article analyzes the impact of material formulations on slitting quality and presents effective strategies for resolving aluminum powder shedding issues.

When NMP (N-Methyl-2-pyrrolidone) residues exceed safety thresholds, subtle side reactions on electrode surfaces trigger chain reactions—compromising SEI film integrity, decomposing electrolytes into acids, inducing binder migration, and obstructing lithium-ion transport. Based on production line case studies, this article details five key process control strategies—including drying gradient optimization and environmental humidity monitoring—to mitigate the critical threat of solvent residues to cell performance.

Unveiling the Steps of Battery Cell Manufacturing