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Journal article
Modeling of Ion Crossover in Vanadium Redox Flow Batteries: A Computationally-Efficient Lumped Parameter Approach for Extended Cycling
Journal of the Electrochemical Society, v 163(1), pp A5244-A5252
01 Jan 2016
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
In this work, we have developed a zero-dimensional vanadium redox flow battery (VRFB) model which accounts for all modes of vanadium crossover and enables prediction of long-term performance of the system in a computationally-efficient manner. Using this model, the effects of membrane thickness on a 1000-cycle operation of a VRFB system have been investigated. It was observed that utilizing a thicker membrane significantly reduces the rate of capacity fade over time (up to similar to 15%) at the expense of reducing the energy efficiency (up to similar to 2%) due to increased ohmic losses. During extended cycling, the capacity of each simulated case was observed to approach an asymptote of similar to 60% relative capacity, as the concentrations in each half-cell reach a quasi-equilibrium state. Simulations also indicated that peak power density and limiting current density exhibit a similar asymptotic trend during extended cycling (i.e., an similar to 10-15% decrease in the peak power density and an similar to 20-25% decrease in the limiting current density is observed as quasi-equilibrium state is reached). (C) 2015 The Electrochemical Society. All rights reserved.
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Details
- Title
- Modeling of Ion Crossover in Vanadium Redox Flow Batteries: A Computationally-Efficient Lumped Parameter Approach for Extended Cycling
- Creators
- Philipp A. Boettcher - Drexel UniversityErtan Agar - University of Massachusetts LowellC. R. Dennison - WallisE. Caglan Kumbur - Drexel University
- Publication Details
- Journal of the Electrochemical Society, v 163(1), pp A5244-A5252
- Publisher
- Electrochemical Soc Inc
- Number of pages
- 9
- Grant note
- 1351161 / Div Of Chem, Bioeng, Env, & Transp Sys; National Science Foundation (NSF); NSF - Directorate for Engineering (ENG) 1351161 / National Science Foundation; National Science Foundation (NSF)
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Mechanical Engineering and Mechanics
- Web of Science ID
- WOS:000366180300032
- Scopus ID
- 2-s2.0-84949971120
- Other Identifier
- 991019173847804721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Electrochemistry
- Materials Science, Coatings & Films