Planetary centrifugal mixer allows Li-ion slurries to be homogenized while eliminating formation of agglomerates when dispersing common materials such as carbon black, graphite, carbon nanotubes, lithium, cobalt, manganese and oxide materials with binders. The presence of agglomerations can cause decreases in battery efficiency, as well as downstream production issues. Vacuum SpeedMixing increases consistency in rheological testing and electrical dispersion by decreasing interference of electrical conductivity via entrained air.