KETEP 세계에너지시장정보

A process of producing a foil with a functional coating containing an active material and a meltable polymer, wherein the foil having a functional coating is for use as an electrode foil, an electrolyte in solid-state batteries, or a separator for electrochemical storage, the process comprising the steps of: (a) providing a dry powder mixture comprising (i) particles of an active material and (ii) particles of a meltable polymer, (b) scattering the dry powder mixture on a foil to form a powder-covered foil, wherein the dry powder mixture does not adhere to the foil after being scattered onto the foil in step (b) and before melting in step (c) and rests on the foil only by the action of gravity, (c) melting the powder of the powder-covered foil to form a foil covered with molten powder, wherein step (c) is carried out before step (d), (d) calendering the foil covered with molten powder to form a calendered structure; and (e) cooling the calendered structure to form the foil with a functional coating.