Abstract
An enzyme-based glucose/O2 biofuel cell was constructed within a microfluidic channel to study the influence of electrode configuration and fluidic channel height on cell performance. The cell was composed of a bilirubin oxidase (BOD)-adsorbed O2 cathode and a glucose anode prepared by co-immobilization of glucose dehydrogenase (GDH), diaphorase (Dp) and VK3-pendant poly-l-lysine. The consumption of O2 at the upstream cathode protected the downstream anode from interfering O2 molecules, and consequently improved the cell performance (maximum cell current) ca. 10% for the present cell. The cell performance was also affected by the channel height. The output current and power of a 0.1 mm-height cell was significantly less than those of a 1 mm-height cell because of the depletion of O2, as determined by the shape of the E-I curve at the cathode. On the other hand, the volume density of current and power was several times higher for the narrower cell.
Original language | English |
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Pages (from-to) | 53-58 |
Number of pages | 6 |
Journal | Journal of Power Sources |
Volume | 178 |
Issue number | 1 |
DOIs | |
Publication status | Published - 2008 Mar 15 |
Keywords
- Biofuel cell
- Diaphorase
- Glucose dehydrogenase
- Microfluidics
- Vitamin K
ASJC Scopus subject areas
- Renewable Energy, Sustainability and the Environment
- Energy Engineering and Power Technology
- Physical and Theoretical Chemistry
- Electrical and Electronic Engineering