1. Microfabricated paper-based vanadium co-laminar flow fuel cell.
- Author
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Jung, Do-Gyun and Ahn, Yoomin
- Subjects
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FUEL cells , *VANADIUM , *MICROBIAL fuel cells , *PROTON exchange membrane fuel cells , *POWER density , *SILK screen printing , *CHANNEL flow - Abstract
Paper-based vanadium membraneless co-laminar flow fuel cells with graphene paste electrodes are developed to enhance the power density. The developed fuel cells are precisely microfabricated utilizing photolithography and screen printing methods for flow channel patterning and electrode forming, respectively. The measured fuel cell performances change with varying concentrations of fuel/oxidant (0.5–2.0 M V2+/VO 2 +) and a support electrolyte (0.5–4.0 M H 2 SO 4). The maximum power density (15.09 ± 1.05 mW cm−2) and maximum current density (30 ± 0.62 mA cm−2) are the highest for concentrations of 2.0 M vanadium redox couple and 2.0 M sulfuric acid. The performance of the proposed fuel cell is also affected by contact with air. Regardless of air contact, the prototype paper-based vanadium fuel cell shows higher performance than those of previously reported paper-based co-laminar flow fuel cells. This novel proof-of-concept fuel cell is important for achieving the required power density for practical use of paper-based microfluidic fuel cells. • Vanadium redox couple is proposed for both fuel and oxidant in the paper-based fuel cell. • Micromachining is used to make precise and reproducible paper-based fuel cells. • Vanadium-based fuel cell shows better performance than other fuel-based fuel cells. • Contact with air adversely affects paper-based vanadium co-laminar flow fuel cells. • The performance depends on the concentration of fuel, oxidant, and electrolyte. [ABSTRACT FROM AUTHOR]
- Published
- 2020
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