Disclosed are bioanodes comprising a quaternary ammonium treated Nafion.RTM. polymer membrane and a dehydrogenase incorporated within the treated Nafion.RTM. polymer. The dehydrogenase catalyzes the oxidation of an organic fuel and reduces an adenine dinucleotide. The ion conducting polymer membrane lies juxtaposed to a polymethylene green redox polymer membrane, which serves to electro-oxidize the reduced adenine dinucleotide. The bioanode is used in a fuel cell to produce high power densities.

 
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