Journal article
Supercapacitor/biofuel cell hybrid device employing biomolecules for energy conversion and charge storage
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.
Language: | English |
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Year: | 2019 |
Pages: | 94-99 |
ISSN: | 1878562x and 15675394 |
Types: | Journal article |
DOI: | 10.1016/j.bioelechem.2019.03.009 |
ORCIDs: | Zhang, Jingdong and Chi, Qijin |