Supercapacitive paper based microbial fuel cell: High current/power production within a low cost design

Carlo Santoro, Jonathan Winfield, Pavlina Theodosiou, Ioannis Ieropoulos

Research output: Contribution to journalArticlepeer-review

Abstract

Microbial fuel cells (MFCs) with paper separators and liquid containing elements were investigated in super- capacitive mode. MFCs (15 mL) in a supercapacitive configuration, consisted of plain wrapped carbon veil anode (negative) and conductive latex cathode (positive). The internal supercapacitor is discharged galvanostatically and is self-recharged as red-ox reactions occur on both electrodes. MFCs were discharged at different current pulses varying from 1 mA to 7 mA. The MFCs had an equivalent series resistance of 41.2 ± 3.5 Ω caused mainly by the cathode. A maximum power of 1.380 ± 0.083 mW (0.092 ± 0.006 mW mL−1) was measured. Durability tests were conducted over 24 h collecting 1000 discharge cycles (0.5 s) and self-recharges (85 s) at a current of 1 mA. Over time the anode potential dropped causing a decline in performance perhaps due to evaporation of liquid from the pyramidal structure. Resistance and apparent capacitance measured during the durability test remained approximately constant during the cycles.
Original languageEnglish
Article number100297
JournalBioresource Technology Reports
Volume7
Early online date27 Jul 2019
DOIs
Publication statusPublished - Sept 2019

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