Journal article
Laser-perforated carbon paper electrodes for improved mass-transport in high power density vanadium redox flow batteries
Journal of power sources, v 260, pp 251-258
15 Aug 2014
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
In this study, we demonstrate up to 30% increase in power density of carbon paper electrodes for vanadium redox flow batteries (VRFB) by introducing perforations into the structure of electrodes. A CO2 laser was used to generate holes ranging from 171 to 421 mu m diameter, and hole densities from 96.8 to 649.8 holes cm(-2). Perforation of the carbon paper electrodes was observed to improve cell performance in the activation region due to thermal treatment of the area around the perforations. Results also demonstrate improved mass transport, resulting in enhanced peak power and limiting current density. However, excessive perforation of the electrode yielded a decrease in performance due to reduced available surface area. A 30% increase in peak power density (478 mW cm(-2)) was observed for the laser perforated electrode with 234 mu m diameter holes and 352.8 holes cm(-2) (1764 holes per 5 cm(2) electrode), despite a 15% decrease in total surface area compared to the raw un-perforated electrode. Additionally, the effect of perforation on VRFB performance was studied at different flow rates (up to 120 mL min(-1)) for the optimized electrode architecture. A maximum power density of 543 mW cm(-2) was achieved at 120 mL min(-1).
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Details
- Title
- Laser-perforated carbon paper electrodes for improved mass-transport in high power density vanadium redox flow batteries
- Creators
- I. Mayrhuber - Drexel UniversityC. R. Dennison - Drexel UniversityV. Kalra - Drexel UniversityE. C. Kumbur - Drexel University, Mechanical Engineering and Mechanics
- Publication Details
- Journal of power sources, v 260, pp 251-258
- Publisher
- Elsevier
- Number of pages
- 8
- Grant note
- CBET 1236466 / National Science Foundation; National Science Foundation (NSF)
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Chemical and Biological Engineering; Mechanical Engineering and Mechanics
- Web of Science ID
- WOS:000335626300034
- Scopus ID
- 2-s2.0-84897489084
- Other Identifier
- 991019167536504721
UN Sustainable Development Goals (SDGs)
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InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Web of Science research areas
- Chemistry, Physical
- Electrochemistry
- Energy & Fuels
- Materials Science, Multidisciplinary