Improved performance Air bio-battery based on efficient oxygen supply with a gas/liquid highly-porous diaphragm cell

Koji Toma, Fumiya Seshima, Ayumi Maruyama, Takahiro Arakawa, Kazuyoshi Yano, Kohji Mitsubayashi

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

Performance of a glucose-driven bio-battery was improved by enhancing electrode characteristics and oxygen supply efficiency to a cathode. The bio-battery generates electric power from glucose through three enzymatic reactions using glucose dehydrogenase, diaphorase and bilirubin oxidase. A flexible and thin Pt electrode was employed instead of a glassy carbon (GC) electrode on which enzymes, a coenzyme, and mediators were immobilized by layer-by-layer method. The maximum current and power densities of the constructed bio-battery were 257 ± 22 μA/cm 2 and 86 ± 3 μW/cm 2 , respectively, in 5 mM glucose solution. In addition, a newly designed compact gas/liquid diaphragm cell, which allowed to reduce the internal resistance by shortening the anode-cathode distance and enhance oxygen supply to a cathode using a highly-porous cotton mesh diaphragm, was implemented to the bio-battery to develop a high-performance Air bio-battery. As a result, improved Air bio-battery showed the maximum current and power densities of 451 ± 27 μA/cm 2 and 162 ± 7 μW/cm 2 , which was 3.6-fold improvement from the previous GC electrode-based bio-battery. In addition, continuous operation for 210 min revealed high stability of power generation as it decreased by 3.3% at the end of operation. Additional supply of oxygen to a cathode exhibited proportional increase of the power density to the oxygen concentration, which demonstrates a promising potential of Air bio-battery for a high-performance and continuous powering device.

Original languageEnglish
Pages (from-to)253-259
Number of pages7
JournalBiosensors and Bioelectronics
Volume124-125
DOIs
Publication statusPublished - 2019 Jan 15
Externally publishedYes

Keywords

  • Air bio-battery
  • Bio-fuel cell
  • Enzyme
  • Gas/liquid diaphragm
  • Glucose

ASJC Scopus subject areas

  • Biotechnology
  • Biophysics
  • Biomedical Engineering
  • Electrochemistry

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