Abstract
For the first time, a paper based enzymatic fuel cell is used as self-recharged supercapacitor. In this supercapacitive enzymatic fuel cell (SC-EFC), the supercapacitive features of the electrodes are exploited to demonstrate high power output under pulse operation. Glucose dehydrogenase-based anode and bilirubin oxidase-based cathode were assembled to a quasi-2D capillary-driven microfluidic system. Capillary flow guarantees the continuous supply of glucose, cofactor and electrolytes to the anodic enzyme and the gas-diffusional cathode design provides the passive supply of oxygen to the catalytic layer of the electrode. The paper-based cell was self-recharged under rest and discharged by high current pulses up to 4 mA cm−2. The supercapacitive behavior and low equivalent series resistance of the cell permitted to achieve up to a maximum power of 0.87 mW cm−2 (10.6 mW) for pulses of 0.01 s at 4 mA cm−2. This operation mode allowed the system to achieve at least one order of magnitude higher current/power generation compared to the steady state operation.
Original language | English |
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Pages (from-to) | 459-465 |
Number of pages | 7 |
Journal | Biosensors and Bioelectronics |
Volume | 86 |
DOIs | |
State | Published - Dec 15 2016 |
Externally published | Yes |
Funding
FS and CA acknowledge financial support by Alma Mater Studiorum – Università di Bologna (Researcher Mobility Program).
Keywords
- Enzymatic fuel cell
- Paper-based microfluidic system
- Power pulses
- Supercapacitor