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Advances in Energy Research Volume 4, Number 4, December 2016 , pages 285-297 DOI: https://doi.org/10.12989/eri.2016.4.4.285 |
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Numerical study of effect of membrane properties on long-cycle performance of vanadium redox flow batteries |
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Zi Wei, N.A. Siddique, Dong Liu, Shambhavi Sakri and Fuqiang Liu
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| Abstract | ||
| Fundamental understanding of vanadium ion transport and the detrimental effects of cross-contamination on vanadium redox flow battery (VRFB) performance is critical for developing low-cost, robust, and highly selective proton-conducting membranes for VRFBs. The objective of this work is to examine the effect of conductivity and diffusivity, two key membrane parameters, on long-cycle performance of a VRFB at different operating conditions using a transient 2D multi-component model. This single-channel model combines the transport of vanadium ions, chemical reactions between permeated ions, and electrochemical reactions. It has been discovered that membrane selecting criterion for long cycles depends critically on current density and operating voltage range of the cell. The conducted simulation work is also designed to study the synergistic effects of the membrane properties on dynamics of VRFBs as well as to provide general guidelines for future membrane material development. | ||
| Key Words | ||
| vanadium redox flow battery; CFD simulation; transient; crossover; membrane | ||
| Address | ||
| Zi Wei, Fuqiang Liu: Department of Mechanical Engineering, University of Massachusetts Lowell, Lowell, MA 01854, USA N.A. Siddique, Dong Liu, Shambhavi Sakri: Department of Materials Science and Engineering, University of Texas at Arlington, Arlington, TX 76019, USA | ||
