High-Power Biofuel Cells with Direct Electron Transfer Using Metallic Cotton Fiber
발표자
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초록
내용
The most important determinant of the performance of enzymatic biofuel cells (BFCs) is the efficiency of electrical communication between the enzyme and the electrode. Here, we introduce a metallic cotton fiber (MCF)-based BFC with facile electrical communication between the enzyme and the conductive support without requiring a mediator. Gold nanoparticles and small organic linkers are layer-by-layer (LbL) assembled onto porous cotton fibers to form MCFs with extremely high conductivity (＞2.1 × 104 S cm−1). Then, thin and compact layers of the enzyme glucose oxidase are sequentially LbL-assembled with the same linkers onto the MCFs. The resulting MCF-BFCs exhibit a remarkable power density of 3.7 mW cm−2, outperforming all biofuel cells reported to date. Our strategy to promote the charge transfer through electrodes can provide an important tool to improve the performance of BFCs.