ELECTROPOLYMERIZATION OF A COATING ONTO AN ELECTRODE MATERIAL

摘要

Methods for reductively polymerizing vinylic based monomers from a solution thereof onto the surface of an electrode material, resulting in thin, electrically insulating solid-polymer electrolyte coatings strongly bound to the surface of the electrode material, are described. The strong bond permits a second electrode to be coated directly onto the solid-polymer electrolyte, thereby incorporating the required components for a Li-ion battery cell. At least one initiator species, which is readily reduced by accepting an electron from the electrode material, is included in electropolymerization deposition solution for permitting the polymerization of vinylic species that would otherwise not electrochemically polymerize without damage to either the electrode material or to the solvents employed.

主权项

1. A method for electrochemically depositing an ionically conducting, electrically insulating coating onto the surface of an electrode material, comprising:
submersing the electrode material into a solution comprising at least one initiator species dissolved in a solvent, wherein the at least one initiator species is capable of being reduced forming a radical species when an electron is injected from the electrode material into the initiator species, and wherein the at least one reduced initiator species is chemisorbed onto the electrode material surface; and at least one monomeric species having at least one vinyl group, or vinyl group derivative, thereon; submersing a second electrode into the solution; and applying an electric potential between the electrode material and the second electrode effective for reducing the at least one initiator species; whereby polymerization of the at least one monomeric species is induced by the reduction of the initiator species forming a coating which is bonded to the surface of the electrode material.