Enzymatic glucose/oxygen biofuel cells: Use of oxygen-rich cathodes for operation under severe oxygen-deficit conditions.
A glucose/oxygen biofuel cell (BFC) that can operate continuously under oxygen-free conditions is described. The oxygen-deficit limitations of metabolite/oxygen enzymatic BFCs have been addressed by using an oxygen-rich cathode binder material, polychlorotrifluoroethylene (PCTFE), which provides an internal oxygen supply for the BFC reduction reaction. This oxygen-rich cathode component mitigates the potential power loss in oxygen-free medium or during external oxygen fluctuations through internal supply of oxygen, while the bioanode employs glucose oxidase-mediated reactions. The internal oxygen supply leads to a prolonged energy-harvesting in oxygen-free solutions, e.g., maintaining over 90% and 70% of its initial power during 10- and 24-h operations, respectively, in the absence of oxygen. The new strategy holds considerable promise for energy-harvesting and self-powered biosensing applications in oxygen-deficient conditions.
['Jeerapan|Itthipon|I|', 'Sempionatto|Juliane R|JR|', 'You|Jung-Min|JM|', 'Wang|Joseph|J|']
D000693:Anaerobiosis D001234:Aspergillus niger D001674:Bioelectric Energy Sources D015374:Biosensing Techniques D004566:Electrodes D004867:Equipment Design D005947:Glucose D005949:Glucose Oxidase D010084:Oxidation-Reduction D010100:Oxygen D011095:Polyethylenes
Glucose Biofuel cells Cathode Polychlorotrifluoroethylene Glucose oxidase Oxygen independence