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Issue 12, 2011
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Enzymatic biofuel cells designed for direct power generation from biofluids in living organisms

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Abstract

Enzymatic biofuel cells have attracted much attention for their potential to directly use biochemical energy sources in living organisms such as animals, fruits, etc. However, generally natural organisms have a skin, and the oxygen concentration in the organisms is lower than that of biofuels like sugars. Here, we fabricated a novel miniature assembly that consists of a needle bioanode for accessing biofuels in organisms through their skins and a gas-diffusion biocathode for utilizing the abundant oxygen in air. The performance of the biocathode was fourfold improved by optimizing its hydrophobicity. The assembled device with four needle anodes for fructose oxidation was inserted into a raw grape, producing a maximum power of 26.5 μW (115 μW cm−2) at 0.34 V. A light-emitting diode (LED) with the cell served as a self-powered indicator of the sugar level in the grape. Power generation from blood sugar was also investigated by inserting a needle anode for glucose oxidation into a blood vessel in a rabbit ear. Prior coating of the tip of the needle anode with an anti-biofouling agent was effective to stabilize the output power.

Graphical abstract: Enzymatic biofuel cells designed for direct power generation from biofluids in living organisms

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Publication details

The article was received on 22 Jul 2011, accepted on 16 Sep 2011 and first published on 20 Oct 2011


Article type: Paper
DOI: 10.1039/C1EE02200H
Citation: Energy Environ. Sci., 2011,4, 5008-5012
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    Enzymatic biofuel cells designed for direct power generation from biofluids in living organisms

    T. Miyake, K. Haneda, N. Nagai, Y. Yatagawa, H. Onami, S. Yoshino, T. Abe and M. Nishizawa, Energy Environ. Sci., 2011, 4, 5008
    DOI: 10.1039/C1EE02200H

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