A system and method of removing an electrolyte from energy storage and conversion devices using a supercritical fluid are provided. The method includes placing a selected device in a container, adding a fluid to the container, adjusting at least one of a temperature and a pressure of the fluid in the container to form the supercritical fluid from the fluid in the container, exposing the supercritical fluid to the electrolyte, and removing the supercritical fluid from the container, wherein removal of the supercritical fluid causes removal of the electrolyte from the container.