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Title

Paper-based enzymatic microfluidic fuel cell: From a two-stream flow device to a single-stream lateral flow strip

AuthorsGonzález-Guerrero, Maria Jose; Campo García, Francisco Javier del ; Esquivel, Juan Pablo; Giroud, Fabien; Minteer, Shelley; Sabaté Vizcarra, María Neus
KeywordsBiofuel cells
Glucose fuel cells
Issue Date15-Sep-2016
PublisherElsevier
CitationJournal of Power Sources 326: 410–416 (2016)
AbstractThis work presents a first approach towards the development of a cost-effective enzymatic paper-based glucose/O2 microfluidic fuel cell in which fluid transport is based on capillary action. A first fuel cell configuration consists of a Y-shaped paper device with the fuel and the oxidant flowing in parallel over carbon paper electrodes modified with bioelectrocatalytic enzymes. The anode consists of a ferrocenium-based polyethyleneimine polymer linked to glucose oxidase (GOx/Fc-C6-LPEI), while the cathode contains a mixture of laccase, anthracene-modified multiwall carbon nanotubes, and tetrabutylammonium bromide-modified Nafion (MWCNTs/laccase/TBAB-Nafion). Subsequently, the Y-shaped configuration is improved to use a single solution containing both, the anolyte and the catholyte. Thus, the electrolytes pHs of the fuel and the oxidant solutions are adapted to an intermediate pH of 5.5. Finally, the fuel cell is run with this single solution obtaining a maximum open circuit of 0.55 ± 0.04 V and a maximum current and power density of 225 ± 17 μA cm−2 and 24 ± 5 μW cm−2, respectively. Hence, a power source closer to a commercial application (similar to conventional lateral flow test strips) is developed and successfully operated. This system can be used to supply the energy required to power microelectronics demanding low power consumption.
Publisher version (URL)http://doi.org/10.1016/j.jpowsour.2016.07.014
URIhttp://hdl.handle.net/10261/145878
DOI10.1016/j.jpowsour.2016.07.014
ISSN0378-7753
Appears in Collections:(IMB-CNM) Artículos
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