A needle-type biofuel cell using enzyme/mediator/carbon nanotube composite fibers for wearable electronics

Sijie Yin, Xiaohan Liu, Yuka Kobayashi, Yuta Nishina, Ryo Nakagawa, Ryoji Yanai, Kazuhiro Kimura, Takeo Miyake

Research output: Contribution to journalArticle

Abstract

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/cm2) 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.

Original languageEnglish
Article number112287
JournalBiosensors and Bioelectronics
Volume165
DOIs
Publication statusPublished - 2020 Oct 1

Keywords

  • Enzymatic biofuel cell
  • Minimal invasive
  • Needle-type
  • Power generation biocompatibility

ASJC Scopus subject areas

  • Biotechnology
  • Biophysics
  • Biomedical Engineering
  • Electrochemistry

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