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, Jinhan Cho

Research output: Contribution to journalArticle

18 Citations (Scopus)

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.

Original languageEnglish
Article number4479
JournalNature Communications
Volume9
Issue number1
DOIs
Publication statusPublished - 2018 Dec 1

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ASJC Scopus subject areas

  • Chemistry(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Physics and Astronomy(all)

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