리튬이온 이차전지 고고형분 양극 슬러리 분산성 향상을 위한 로터-스테이터 기반 순환 믹서 공정 개발

초록

In lithium-ion battery electrode manufacturing, slurry mixing process directly affects coating process ability and the resulting electrode microstructure. High-solid-fraction cathode slurries for thick-electrode appli cations are particularly difficult to disperse uniformly because of their increased viscosity and the persistence ofagglomerates. In this work, a rotor-stator-based recirculation mixing system was investigated to improve the dis persibility of high-solid-fraction cathode slurries. Rotational speed, recirculation flow rate, and pass number wereconsidered as process parameters, and slurry viscosity and particle-size distribution were measured under variousprocess conditions. The experimental results were used to evaluate the effects of the process parameters on theviscosity and particle-size distributions. Based on these findings, practical process conditions to achieve improveddispersion under high-solid-fraction conditions was discussed. The results provide useful baseline data for thedesign of mixing conditions and for scale-up studies of high-solid-fraction cathode slurry processes

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