High-power hybrid biofuel cells using layer-by-layer assembled glucose oxidase-coated metallic cotton fibers

Cheong Hoon Kwon, Yongmin Ko, Dongyeeb Shin, Minseong Kwon, Jinho Park, Wan Ki Bae, Seung Woo Lee () and Jinhan Cho ()
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Cheong Hoon Kwon: Korea University
Yongmin Ko: Korea University
Dongyeeb Shin: Korea University
Minseong Kwon: Korea University
Jinho Park: Georgia Institute of Technology
Wan Ki Bae: Sungkyunkwan University
Seung Woo Lee: Georgia Institute of Technology
Jinhan Cho: Korea University

Nature Communications, 2018, vol. 9, issue 1, 1-11

Abstract: Abstract 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 (>2.1×104 S cm−1), 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−2, 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.

Date: 2018
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DOI: 10.1038/s41467-018-06994-5

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