Journal article
A Transient Vanadium Flow Battery Model Incorporating Vanadium Crossover and Water Transport through the Membrane
Journal of the Electrochemical Society, v 159(9), pp A1446-A1459
01 Jan 2012
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
This paper presents a 2-D transient, isothermal model of a vanadium redox flow battery that can predict the species crossover and related capacity loss during operation. The model incorporates the species transport across the membrane due to convection, diffusion, and migration, and accounts for the transfer of water between the half-cells to capture the change in electrolyte volume. The model also accounts for the side reactions and associated changes in species concentration in each half-cell due to vanadium crossover. A set of boundary conditions based on the conservations of flux and current are incorporated at the electrolyte| membrane interfaces to account for the steep gradients in concentration and potential at these interfaces. In addition, the present model further improves upon the accuracy of existing models by incorporating a more complete version of the Nernst equation, which enables accurate prediction of the cell potential without the use of a fitting voltage. A direct comparison of the model predictions with experimental data shows that the model accurately predicts the measured voltage of a single charge/discharge cycle with an average error of 1.83%, and estimates the capacity loss of a 45 cycle experiment with an average error of 4.2%. (C) 2012 The Electrochemical Society. [DOI: 10.1149/2.017209jes] All rights reserved.
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Details
- Title
- A Transient Vanadium Flow Battery Model Incorporating Vanadium Crossover and Water Transport through the Membrane
- Creators
- K. W. Knehr - Drexel UniversityErtan Agar - Drexel UniversityC. R. Dennison - Drexel UniversityA. R. Kalidindi - Drexel UniversityE. C. Kumbur - Drexel University
- Publication Details
- Journal of the Electrochemical Society, v 159(9), pp A1446-A1459
- Publisher
- Electrochemical Soc Inc
- Number of pages
- 14
- Grant note
- 001389-002 / Southern Pennsylvania Ben Franklin Commercialization Institute DGE-0654313 / National Science Foundation Integrative Graduate Education and Research Traineeship; National Science Foundation (NSF) 235638 / National Science Foundation Research Experience for Undergraduates; National Science Foundation (NSF)
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Mechanical Engineering and Mechanics
- Web of Science ID
- WOS:000309104400010
- Scopus ID
- 2-s2.0-84870510061
- Other Identifier
- 991019168117804721
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InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Web of Science research areas
- Electrochemistry
- Materials Science, Coatings & Films