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

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

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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


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

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