Electrolyte dispensing systems according to embodiments of the present technology may include a housing defining an internal volume. The housing may define an inlet and an outlet. The dispensing system may include an inlet roller positioned proximate the housing inlet. The inlet roller may be configured to provide a substantial seal at the housing inlet when a substrate is delivered into the housing. The dispensing system may include a delivery device positioned between the housing inlet and housing outlet. The delivery device may be configured to supply an electrolyte to the substrate delivered into the housing. The electrolyte dispensing system may also include an outlet roller positioned proximate the housing outlet. The outlet roller may be configured to provide a substantial seal at the housing outlet when the substrate is delivered from the housing.