Department of Chemical and Biological Engineering, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul, 02841, Republic of Korea.
The George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA.
Nat Commun. 2018 Oct 26;9(1):4479. doi: 10.1038/s41467-018-06994-5.
Electrical communication between an enzyme and an electrode is one of the most important factors in determining the performance of biofuel cells. Here, we introduce a glucose oxidase-coated metallic cotton fiber-based hybrid biofuel cell with efficient electrical communication between the anodic enzyme and the conductive support. Gold nanoparticles are layer-by-layer assembled with small organic linkers onto cotton fibers to form metallic cotton fibers with extremely high conductivity (>2.1×10 S cm), and are used as an enzyme-free cathode as well as a conductive support for the enzymatic anode. For preparation of the anode, the glucose oxidase is sequentially layer-by-layer-assembled with the same linkers onto the metallic cotton fibers. The resulting biofuel cells exhibit a remarkable power density of 3.7 mW cm, significantly outperforming conventional biofuel cells. Our strategy to promote charge transfer through electrodes can provide an important tool to improve the performance of biofuel cells.
酶和电极之间的电通讯是决定生物燃料电池性能的最重要因素之一。在这里，我们介绍了一种葡萄糖氧化酶涂层的基于金属棉纤维的混合生物燃料电池，在阳极酶和导电基底之间具有高效的电通讯。金纳米粒子通过小的有机连接体逐层组装到棉纤维上，形成具有极高导电性（>2.1×10^-2 S cm）的金属棉纤维，并用作无酶阴极以及酶阳极的导电基底。为了制备阳极，葡萄糖氧化酶通过相同的连接体依次层状组装到金属棉纤维上。所得的生物燃料电池表现出显著的功率密度 3.7 mW cm^-2，明显优于传统的生物燃料电池。我们通过电极促进电荷转移的策略可以为提高生物燃料电池的性能提供一个重要的工具。
