An all-extruded tubular vanadium redox flow cell - Characterization and model-based evaluation

IF 5.4 Q2 CHEMISTRY, PHYSICAL Journal of Power Sources Advances Pub Date : 2021-12-01 DOI:10.1016/j.powera.2021.100077
Simon Ressel , Peter Kuhn , Simon Fischer , Michael Jeske , Thorsten Struckmann
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引用次数: 3

Abstract

The vanadium redox flow battery (VRFB) as one of the most promising electrochemical storage systems for stationary applications still needs further cost reductions. Tubular cell designs might reduce production costs by extrusion production of cell components and small sealing lengths. Based on a first study of the authors [1], this work demonstrates the feasibility of extruded tubular VRFB cells with high power density in the flow-by electrode configuration. Extruded cell components are the perfluorosulfonic acid cation exchange membrane with a diameter of 5.0 mm and carbon composite current collectors. The cell performance is experimentally characterized by polarization curve, ohmic resistance and galvanostatic cycling measurements. A maximum volumetric power density of 407 kW/m3 and a maximum current density of 500 mA/cm2 can be achieved. A non linear Ecell/i-model is used to evaluate exchange and limiting current densities while in-situ half cell SoC monitoring is applied to evaluate the extruded membrane.

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全挤压管式钒氧化还原流动电池-表征和基于模型的评价
钒氧化还原液流电池(VRFB)作为固定化应用中最有前途的电化学存储系统之一,仍需进一步降低成本。管状电池设计可以通过挤压生产电池组件和较小的密封长度来降低生产成本。基于作者的第一项研究[1],这项工作证明了在流动电极配置下具有高功率密度的挤压管状VRFB电池的可行性。挤压电池组件为直径为5.0 mm的全氟磺酸阳离子交换膜和碳复合集流器。通过极化曲线、欧姆电阻和恒流循环测量对电池性能进行了实验表征。最大体积功率密度为407 kW/m3,最大电流密度为500 mA/cm2。非线性Ecell/i模型用于评估交换和极限电流密度,而原位半电池SoC监测用于评估挤压膜。
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来源期刊
CiteScore
9.10
自引率
0.00%
发文量
18
审稿时长
64 days
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