全钒液流电池新型交错蛇型流道研究

A New Detached Serpentine Flow Field Design for All Vanadium Redox Flow Battery

本文在传统全钒液流电池交叉型流道和蛇型流道的基础上提出了新型交错蛇型流道。基于全钒液流电池三维瞬态模型模拟结果,总结了新型交错蛇型流道与传统蛇型流道和交叉型流道对电解液渗入量、电解液在电极中分布的均匀性以及泵损失等参数的影响规律。研究结果表明,交错蛇型流道的设计在确保电解液全部渗入和一次性渗入渗出电极的同时也在电极中具有较大的当地速度和反应离子浓度,这些优势使交错蛇型流道的电池性能优于传统交叉型和传统蛇型流道电池。

A new detached serpentine flow field design is proposed and the design is inspired by the traditional interdigitated and serpentine flow fields for the all-vanadium redox flow battery.The three flow fields are compared in terms of the electrolyte penetration,distribution uniformity,and pressure drop that are generated via the developed 3-D transient model.The simulation results show that the detached serpentine flow field outperforms the traditional interdigitated and serpentine flow fields by providing higher electrolyte penetration and better velocity and concentration distributions of the active species within the felt electrode.