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Casting, or coating, is the process in which a well-mixed viscous liquid slurry is converted into a solid electrode form. As most conventional casting of battery slurries results in a thin layer on a metal current collector substrate, this process is sometimes called coating. Casting is an important early step in the battery manufacturing process. Inhomogeneities in the slurry mixing process can result in structural defects in the electrode formation process. Process control is also important to preventing other types of defects from occurring in the finished electrode. Casting can be performed from lab-scale up to gigafactory-scale.