Yin Sijie, Liu Xiaohan, Kobayashi Yuka, Nishina Yuta, Nakagawa Ryo, Yanai Ryoji, Kimura Kazuhiro, Miyake Takeo
Graduate School of Information, Production and Systems, Waseda University, 2-7 Hibikino, Wakamatsu, Kitakyushu, Fukuoka, 808-0135, Japan.
Department of Ophthalmology, Yamaguchi University Graduate School of Medicine Ube, Yamaguchi, 755-8505, Japan.
Biosens Bioelectron. 2020 Oct 1;165:112287. doi: 10.1016/j.bios.2020.112287. Epub 2020 May 12.
To realize direct power generation from biofuels in natural organisms, we demonstrate a needle-type biofuel cell (BFC) using enzyme/mediator/carbon nanotube (CNT) composite fibers with the structure Osmium-based polymer/CNT/glucose oxidase/Os-based polymer/CNT. The composite fibers performed a high current density (10 mA/cm) in 5 mM artificial blood glucose. Owing to their hydrophilicity, they also provided sufficient ionic conductivity between the needle-type anode and the gas-diffusion cathode. When the tip of the anodic needle was inserted into natural specimens of grape, kiwifruit, and apple, the assembled BFC generated powers of 55, 44, and 33 μW from glucose, respectively. In addition, the power generated from the blood glucose in mouse heart was 16.3 μW at 0.29 V. The lifetime of the BFC was improved by coating an anti-fouling polymer 2-methacryloyloxyethyl phosphorylcholine (MPC) on the anodic electrode, and sealing the cathodic hydrogel chamber with medical tape to minimize the water evaporation without compromising the oxygen permeability.
为了在天然生物体中实现生物燃料的直接发电，我们展示了一种针型生物燃料电池（BFC），它使用具有锇基聚合物/碳纳米管/葡萄糖氧化酶/锇基聚合物/碳纳米管结构的酶/介质/碳纳米管（CNT）复合纤维。该复合纤维在5 mM人工血糖中表现出高电流密度（10 mA/cm）。由于其亲水性，它们还在针型阳极和气体扩散阴极之间提供了足够的离子导电性。当将阳极针的尖端插入葡萄、猕猴桃和苹果的天然样本中时，组装好的BFC分别从葡萄糖中产生了55、44和33 μW的功率。此外，在小鼠心脏中，血糖产生的功率在0.29 V时为16.3 μW。通过在阳极电极上涂覆防污聚合物2-甲基丙烯酰氧基乙基磷酰胆碱（MPC），并用医用胶带密封阴极水凝胶腔室以在不影响透氧性的情况下最小化水分蒸发，提高了BFC的寿命。
