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A symmetric supercapacitor/biofuel cell hybrid device based on enzyme-modified nanoporous gold: an autonomous pulse generator

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Show simple item record Xiao, Xinxin Ó Conghaile, Peter Leech, Dónal Ludwig, Roland Magner, Edmond 2016-11-23T08:57:18Z 2016
dc.description peer-reviewed en_US
dc.description.abstract The integration of supercapacitors with enzymatic biofuel cells (BFCs) can be used to prepare hybrid devices in order to harvest significantly higher power output. In this study, a supercapacitor/biofuel cell hybrid device was prepared by the immobilisation of redox enzymes with electrodeposited poly(3,4-ethylenedioxythiophene) (PEDOT) and the redox polymer [Os(2,2′-bipyridine)2(polyvinylimidazole)10Cl]+/2+(Os(bpy)2PVI) on dealloyed nanoporous gold. The thickness of the deposition layer can be easily controlled by tuning the deposition conditions. Once charged by the internal BFC, the device can be discharged as a supercapacitor at a current density of 2 mA cm−2 providing a maximum power density of 608.8 μW cm−2, an increase of a factor of 468 when compared to the power output from the BFC itself. The hybrid device exhibited good operational stability for 50 charge/discharge cycles and ca. 7 h at a discharge current density of 0.2 mA cm−2. The device could be used as a pulse generator, mimicking a cardiac pacemaker delivering pulses of 10 μA for 0.5 ms at a frequency of 0.2 Hz. en_US
dc.language.iso eng en_US
dc.publisher Elsevier en_US
dc.relation 607793 en_US
dc.relation.ispartofseries Biosensors and Bioelectronics;90, pp. 96-102
dc.rights This is the author’s version of a work that was accepted for publication in <Journal title>. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Biosensors and Bioelectronics, 90, pp. 96-102, en_US
dc.subject biofuel cell en_US
dc.subject bioelectrochemistry en_US
dc.subject supercapacitor en_US
dc.subject nanoporous gold en_US
dc.title A symmetric supercapacitor/biofuel cell hybrid device based on enzyme-modified nanoporous gold: an autonomous pulse generator en_US
dc.type info:eu-repo/semantics/article en_US
dc.type.supercollection all_ul_research en_US
dc.type.supercollection ul_published_reviewed en_US
dc.identifier.doi 10.1016/j.bios.2016.11.012
dc.contributor.sponsor Government of Ireland Postgraduate Scholarship en_US
dc.contributor.sponsor ERC en_US
dc.relation.projectid GOIPG/2014/659 en_US
dc.relation.projectid 607793 en_US 2018-11-09
dc.embargo.terms 2018-11-09 en_US
dc.rights.accessrights info:eu-repo/semantics/openAccess en_US
dc.internal.rssid 2700740

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