Supercapacitor/biofuel cell hybrid device employing biomolecules for energy conversion and charge storage

Forskningsoutput: TidskriftsbidragArtikel i vetenskaplig tidskrift

Abstract

We report on a hybrid bioelectrochemical system that integrates an energy converting part, viz. a glucose/oxygen enzymatic fuel cell, with a charge-storing component, in which the redox features of the immobilized redox protein cytochrome c (cyt c) were utilized. Bilirubin oxidase and pyrroloquinoline quinone-dependent glucose dehydrogenase (PQQ-GDH) were employed as the biocatalysts for dioxygen reduction and glucose oxidation, respectively. A bi-protein PQQ-GDH/cyt c signal chain was created that facilitates electron transfer between the enzyme and the electrode surface. The assembled supercapacitor/biofuel cell hybrid biodevice displays a 15 times higher power density tested in the pulse mode compared to the performance achieved from the continuously operating regime (4.5 and 0.3 μW cm −2 , respectively) with an 80% residual activity after 50 charge/discharge pulses. This can be considered as a notable step forward in the field of glucose/oxygen membrane-free, biocompatible hybrid power sources.

Detaljer

Författare
Enheter & grupper
Externa organisationer
  • Technical University of Denmark
  • Novozymes A/S
Forskningsområden

Ämnesklassifikation (UKÄ) – OBLIGATORISK

  • Industriell bioteknik
  • Kemi

Nyckelord

Originalspråkengelska
Sidor (från-till)94-99
Antal sidor6
TidskriftBioelectrochemistry
Volym128
StatusPublished - 2019
PublikationskategoriForskning
Peer review utfördJa