Encapsulated dry electrolyte composition for time release into a solute

摘要

A device for delivering a water soluble electrolyte is provided comprising a core of a solid electrolyte composition enclosed by a polymeric coating which is permeable to water. The coating has at least one hole to permit passage of an aqueous solution of the electrolyte. The device is useful to maintain the concentration of an electrolyte composition in an electrochemical apparatus such as a fuel cell or a battery.