论文标题

基于comsol的镍钒氧化还原流量电池的特性

Characteristics of a Nickel Vanadium redox flow battery Based on COMSOL

论文作者

Saha, Anupam, Eskender, Shinthia Binte

论文摘要

在本研究中建议分析镍钒氧化还原流量电池(NVRFB)的过电势,解离速率,电极电位分布和电流密度。由于其容量较大和友好型性能,NVRFB可能是当前能量限制和环境污染的可行选择。由于它们的低成本和高能量密度,基于镍的流量电池已越来越受欢迎。这项研究表明,Ni2+/Ni+和V5+/V4+离子在膜上具有较高的解离速率,而在电解质流量速度更大的入口处的速率更低。由于膜经历了更多的氧化还原反应,因此电解质流速在氧化还原流动池中至关重要。此外,我们看到,当电极厚度减小时,电流密度和电极电势增加,而过度降低。使用COMSOL多物理程序中的有限元方法求解模型的方程。电解质电极界面连接用于模拟反应。解离速率表明氧化还原过程在较低的膜电位上发生。提高电解质流量可以增强电池性能。电极的压缩会增强电导率和电池性能。

The overpotential, dissociation rate, electrode potential distributions and current density are suggested in this study to analyze the Nickel Vanadium Redox Flow Battery (NVRFB). Due to its large capacity and ecofriendly properties, NVRFB may be a viable option in the present state of energy constraint and environmental pollution. Due to their low cost and high energy density, nickel-based flow batteries have gained popularity. This study demonstrates that the Ni2+/Ni+ and V5+/V4+ ions have a higher rate of dissociation at the membrane and a lower rate at the inlet, where the electrolyte flow velocity is greater; Because the membrane undergoes more oxidation-reduction reactions, the electrolyte flow rate is critical in the redox flow cell; Additionally, we see that when electrode thickness is reduced, current density and electrode potential increase while overpotential decreases; the model's equations are solved using the finite-element method in the COMSOL Multiphysics program. An electrolyte-electrode interface connection is used to simulate the reaction. The dissociation rate indicates that the oxidation-reduction process happens at a lower membrane potential. Improving the electrolyte flow rate enhances battery performance. Compression of the electrodes enhances conductivity and battery performance.

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