Patent ID: 8859151
Filing Date: 2014-10-14
Classification: B82Y,H01M,Y02E

Abstract:
1. A biocathode comprising: (a) an electron conductor; (b) an electron mediator; (c) at least one enzyme capable of reacting with a reduced form of the electron mediator and an oxidant to produce an oxidized form of the electron mediator and water; and (d) an electron conducting enzyme immobilization material comprising an electrocatalyst, the enzyme immobilization material immobilizing and stabilizing the enzyme, the material being permeable to the oxidant, an oxidized form of the electrocatalyst being capable of gaining electrons from the electron conductor to produce a reduced form of the electrocatalyst that is capable of reacting with an oxidized form of the electron mediator to produce a reduced form of the electron mediator and an oxidized form of the electrocatalyst; wherein the enzyme is entrapped within pores of the enzyme immobilization material and the enzyme immobilization material comprises an ion exchange polymer comprising a hydrophobic cation.