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

Fei Shen, Dmitry Pankratov, Galina Pankratova, Miguel D. Toscano, Jingdong Zhang, Jens Ulstrup, Qijin Chi, Lo Gorton

Research output: Contribution to journalArticlepeer-review


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.

Original languageEnglish
Pages (from-to)94-99
Number of pages6
Publication statusPublished - 2019

Subject classification (UKÄ)

  • Industrial Biotechnology
  • Chemical Sciences

Free keywords

  • Bilirubin oxidase
  • Cytochrome c
  • Enzymatic fuel cell
  • Glucose dehydrogenase
  • Hybrid bioelectrochemical system


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