Patent ID: 8658241
Filing Date: 2014-02-25
Classification: H01M,Y02E,Y02P

Abstract:
1. A method of forming a bi-polar electrode having ion exchange polymers on opposite faces of a porous substrate, the method comprising: providing an electrode substrate with activated carbon layers on opposite faces of the electrode substrate, wherein said faces have an outer perimeter band void of the activated carbon layers, placing the electrode substrate in a thermoplastic envelope formed by a pair of polyethylene films; thermally sealing the envelope to the outer perimeter band of the electrode substrate void of activated carbon to form a first pocket on one side of the electrode substrate and a second pocket on the opposite side of the electrode substrate; clamping the envelope between two rigid plates; inserting a first polymerizable monomer mixture having an anion exchange group into the first pocket of the envelope inserting a second polymerizable monomer mixture having a cation exchange group into the second pocket of the envelope; and polymerizing the first and second polymerizable monomers mixtures.