A hybrid bioelectrochemical device based on glucose/O2 enzymatic biofuel cell for energy conversion and storage
In this work, combining poly (methylene green)/glucose dehydrogenase (PMG/GDH) bioanode with Prussian blue/glucose oxidase (PB/GOD) biocathode, we developed a hybrid bioelectrochemical device based on glucose/O2 enzymatic biofuel cell (EBFC) to achieve energy conversion and storage. Depending on the...
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Published in | Electrochimica acta Vol. 420; p. 140440 |
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Main Authors | , , , , |
Format | Journal Article |
Language | English |
Published |
Oxford
Elsevier Ltd
10.07.2022
Elsevier BV |
Subjects | |
Online Access | Get full text |
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Summary: | In this work, combining poly (methylene green)/glucose dehydrogenase (PMG/GDH) bioanode with Prussian blue/glucose oxidase (PB/GOD) biocathode, we developed a hybrid bioelectrochemical device based on glucose/O2 enzymatic biofuel cell (EBFC) to achieve energy conversion and storage. Depending on the reversible redox behaviors, PMG and PB play roles of dual-functional nanomaterials, not only as mediators to accelerate electrons transport between enzymes and electrodes surface, but also as pseudocapacitive materials to achieve energy storage. As a result, this hybrid device exhibited superior performance towards energy storage with a specific capacitance of 158.5 mF cm−2 at the current density of 1 mA cm−2. Meanwhile, a maximum output power density of 783.5 μW cm−2 in the pulse mode could be obtained, which had a prominent increment than that of the prototypical EBFC (87.5 μW cm−2) in the steady state. Furthermore, this hybrid device also exhibited better operational stability in long-term charge/discharge cycles test, at the current pulse of 1 mA cm−2. Through the combination of bioelectrocatalysis and capacitive energy storage, this developed hybrid device achieves effective energy conversion and storage, and provides a high output power to address the insufficient power supply of traditional EBFCs, which may enlarge the practical application of EBFCs in self-powered implantable and wearable devices. |
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ISSN: | 0013-4686 1873-3859 |
DOI: | 10.1016/j.electacta.2022.140440 |