A Three-Dimensional Model for Mass Transfer in Vanadium Redox Flow Battery

Abstract:

In this paper, a three-dimension model for the vanadium redox flow battery was established to simulate its mass transfer. The distribution of VO₂⁺and VO²⁺ in positive electrode area, the distribution of V²⁺ and V³⁺ in the negative electrode area, and the influences of flow velocity, temperature and the electrolyte concentration on the mass transfer are analyzed. The results show that the mass fraction of VO₂⁺ and V²⁺ decrease while those of VO²⁺and V³⁺increase along the channel direction; the species concentration under the ridge is lower than that under the flow channel. The flow velocity of electrolyte affects the mass distribution at the entrance of the cell, and hardly affects the electrochemical reaction rate; Increase of the temperature accelerates the electrochemical reaction rate; the electrolyte concentration affects both of the mass distribution and the number of ions. The study has great significance both on the optimization of vanadium redox flow battery and its application.

• Periodical: Applied Mechanics and Materials (Volumes 672-674)
• Pages: 587-591
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.672-674.587
• Online since: October 2014
• Authors: Si Yu Liu, Ming Fu Yu, Ye Wan, Hong Sun*
• Keywords: Electrolyte, Mass Transfer, Model, Numerical Simulation, Vanadium Redox Flow Battery

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