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Mediator-free carbon nanotube yarn biofuel cell

机译：介质的碳纳米管纱生物燃料细胞

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摘要

Enzymatic biofuel cells are the most promising energy sources for implanted biomedical devices. However, direct implantation of biofuel cells has been limited by toxicity from metal-based redox mediators, and by a short operation time because of their instability, especially in physiological conditions. Here we introduce a yarn-type enzymatic biofuel cell for direct electron transfer using surface tension induced self-assembly of aligned multi-walled carbon nanotubes. This biofuel cell offers a maximum power density of 236 μW cm ~(?2) , and an open circuit voltage of 0.61 V in 30 mM glucose-containing phosphate-buffered saline, without any mediators or chemical cross-linkers. Furthermore, the proposed self-assembled carbon nanotube-based structure provides enhanced stability for biofuel cells: 84% of the initial power output was consistently maintained after 20 days of continuous operation. Our biocompatible, microsized yarn biofuel cell electrode could be applied easily as needle or catheter shapes in various biomedical fields.
机译：酶生物燃料电池是植入生物医学装置最有希望的能源。然而，生物燃料细胞的直接植入受金属基氧化还原介质的毒性有限，并且由于其不稳定性，特别是在生理条件下，通过短暂的操作时间。在这里，我们使用表面张力诱导的对齐的多壁碳纳米管自组装引入用于直接电子转移的纱线型酶生物燃料电池。该生物燃料电池提供236μWCM〜（Δ2）的最大功率密度，以及0.61V的含30mM葡萄糖缓冲盐水的开路电压，没有任何介质或化学交联剂。此外，所提出的自组装碳纳米管基结构为生物燃料细胞提供了增强的稳定性：在连续操作的20天后，84％的初始功率输出始终保持。我们的生物相容性，微化的微化纱线生物燃料电池电极可以在各种生物医学领域中容易地应用于针或导管形状。

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