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- Title
Ultrasonic Spray Coating to Optimize Performance of Bio-Electrochemical Systems.
- Authors
Spisni, Giacomo; Massaglia, Giulia; Pirri, Fabrizio C.; Bianco, Stefano; Quaglio, Marzia
- Abstract
This work investigates the optimization of carbon-based electrodes employed in bio-electrochemical systems (BES) through the deposition of nanostructured layers of poly(3,4-ethylene-dioxy-thiophene) poly(styrene-sulfonate) (PEDOT:PSS) on commercial carbon paper electrodes via ultrasonic spray coating (USC). This innovative application of USC demonstrated that uniform and controlled depositions of PEDOT:PSS can be successfully performed on carbon-based electrodes. To this end, the morphology and spatial uniformity of depositions were verified via scanning electron microscopy and Raman spectroscopy. Electrochemical characterizations of fabricated electrodes demonstrated a more than two-fold increase in the electrochemical active surface area with respect to bare carbon paper. A lab-scale experiment on BES was performed, selecting microbial fuel cells (MFCs) as the reference devices. Devices featuring USC-deposited PEDOT:PSS electrodes showed a three-fold-higher energy recovery with respect to control cells, reaching a maximum value of (13 ± 2) J·m−3. Furthermore, the amount of PEDOT:PSS required to optimize MFCs' performance is in line with values reported in the literature for other deposition methods. In conclusion, this work demonstrates that USC is a promising technique for application in BES.
- Subjects
UNITED States Code; MICROBIAL fuel cells; CARBON electrodes; RAMAN microscopy; CARBON paper; ULTRASONICS
- Publication
Nanomaterials (2079-4991), 2023, Vol 13, Issue 22, p2926
- ISSN
2079-4991
- Publication type
Article
- DOI
10.3390/nano13222926