An integrated device of enzymatic biofuel cells and supercapacitor for both efficient electric energy conversion and storage. (10th August 2017)

• Record Type: Journal Article
• Authors: Hou, Chuantao; Liu, Aihua
• Is Part Of: Electrochimica acta. Volume 245(2017)
• Page Start: 303
• Page End: 308
• Publication Date: 2017-08-10
• Subjects: integrated device -- enzymatic biofuel cells -- supercapacitor -- maximum power density; Electrochemistry -- Periodicals; Electrochemistry, Industrial -- Periodicals; 541.37
• DOI: 10.1016/j.electacta.2017.05.136
• Languages: English
• ISSNs: 0013-4686

Abstract

Abstract: An integrated device of enzymatic biofuel cells (EBFCs) and supercapacitor (SC) on glass or flexible polyethylene terephthalate for both electric energy conversion and storage has been developed. A glucose/O2 EBFC was fabricated by modifying flavin adenine dinucleotide-glucose dehydrogenase and laccase on multi-walled carbon nanotubes (MWNTs) based buckypaper as bioanode and biocathode, respectively. While the SC was fabricated by sandwiching a poly(vinyl alcohol)-H3 PO4 (PVA-H3 PO4 ) electrolyte between two aligned MWNTs/polyaniline electrodes. The integrated device showed lower internal resistance than previous report because of the use of solid state electrolyte PVA-H3 PO4 . Furthermore, the self-charged device containing two EBFCs and one SC achieved a high charging voltage of 0.8 V and a maximum power density of 608 μW cm −2, which was 1.9 times of that value for two individual EBFCs in series (326 ± 10 μW cm −2 ). Such a miniaturized device with a light weight and flexible property would enable new opportunity for portable and wearable devices.