Enzymatic biofuel cells designed for direct power generation from biofluids in living organisms
Enzymatic biofuel cells designed for direct power generation from biofluids in living organisms
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DOI：
10.1039/c1ee02200h
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发表时间：
2011-12-01
影响因子：
32.5
通讯作者：
Nishizawa, Matsuhiko
中科院分区：
文献类型：
--
作者：
Miyake, Takeo;Haneda, Keigo;Nishizawa, Matsuhiko
酶生物燃料电池由于其直接使用生物体（例如动物、水果等）中的生化能源的潜力而备受关注。然而，通常天然生物体具有皮肤，并且生物体中的氧浓度低于生物燃料（例如糖）的氧浓度。在这里，我们制造了一种新型的微型组件，它由一个针生物阳极和一个气体扩散生物阴极组成，针生物阳极用于通过皮肤获取生物体内的生物燃料，气体扩散生物阴极用于利用空气中丰富的氧气。通过优化其疏水性，生物阴极的性能提高了四倍。将用于果糖氧化的具有四个针状阳极的组装装置插入生葡萄中，在0.34 V下产生26.5 μ W（115 μ W cm（-2））的最大功率。具有电池的发光二极管（LED）用作葡萄中糖水平的自供电指示器。还通过将用于葡萄糖氧化的针状阳极插入兔耳中的血管中来研究来自血糖的发电。针阳极的尖端的抗生物污染剂的预先涂覆对于稳定输出功率是有效的。
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 mu W (115 mu W 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.