Abstract: A method (80) of manufacturing an electrochemical cell having electrodes and a separator element is disclosed. The method comprises the steps of providing (81) a mixture consisting of either an electroactive or inert material and a polymeric binder, transferring (83) the mixture into a pressure vessel, introducing (85) a gas into the pressure vessel, adjusting (87) the pressure and temperature inside of the pressure vessel such that the gas reaches a critical point at which the gas behaves like a supercritical fluid, and spraying (89) the mixture onto at least one of the current collecting substrates, electrodes and/or the separator element.