A transient model for charge and mass transfer through anion exchange membranes in vanadium redox flow batteries

Lei，Y.1,2; Zhang，B. W.2; Bai，B. F.2; Chen，X.4; Zhao，T. S.3

2022-05-01

10.1016/j.ijheatmasstransfer.2021.122509

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER   影响因子和分区

0017-9310

Vanadium redox flow batteries (VRFBs) with anion exchange membranes (AEMs) exhibit a high columbic efficiency and slow capacity decay due to the reduced crossover rate of vanadium ions. Modeling of this promising type of flow battery is challenging because of the difficulty in the description of charge and mass transfer through AEMs. In this work, we propose a transient model for VRFBs with AEM, which incorporates the ion selective adsorption to overcome the inaccurate description of ion distributions in AEM, and improves the transport coefficients to avoid their changes with different electrolytes, thereby introducing AEM parameters such as porosity and fixed charges into the description of charge and mass transfer. It shows that the simulation results of ion selective adsorption are highly consistent with the experiment; the effects of AEM parameters on transport processes and battery performance are well captured. Interestingly, it is found that the current density in AEM is carried by both H and HSO ions, and the proportion of H ions is quite large. At high current densities, an increase in AEM porosity greatly improve the voltage efficiency while maintaining a high coulombic efficiency. Meanwhile, small capacity decay rate can be obtained by adjusting fixed concentration.

Anion exchange membrane Battery performance Charge and mass transfer through membrane Ion selective adsorption Vanadium redox flow battery

EI

英语

通讯

20220211433351

Decay (organic) ; Efficiency ; Flow batteries ; Ion exchange ; Ion exchange membranes ; Ions ; Porosity ; Vanadium

Vanadium and Alloys:543.6 ; Mass Transfer:641.3 ; Secondary Batteries:702.1.2 ; Biochemistry:801.2 ; Chemical Plants and Equipment:802.1 ; Chemical Reactions:802.2 ; Production Engineering:913.1 ; Physical Properties of Gases, Liquids and Solids:931.2

ENGINEERING

2-s2.0-85122250378

Scopus

1.School of Chemical Engineering,Northwest University,Xi'an,710069,China
2.State Key Laboratory of Multiphase Flow in Power Engineering,Xi'an Jiaotong University,Xi'an,710049,China
3.Department of Mechanical and Energy Engineering,Southern University of Science and Technology,China
4.Department of Earth and Environmental Engineering,Earth Engineering Center,Center for Advanced Materials for Energy and Environment,Columbia University,New York,10027,United States

Lei，Y.,Zhang，B. W.,Bai，B. F.,et al. A transient model for charge and mass transfer through anion exchange membranes in vanadium redox flow batteries[J]. INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER,2022,186.

Lei，Y.,Zhang，B. W.,Bai，B. F.,Chen，X.,&Zhao，T. S..(2022).A transient model for charge and mass transfer through anion exchange membranes in vanadium redox flow batteries.INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER,186.

Lei，Y.,et al."A transient model for charge and mass transfer through anion exchange membranes in vanadium redox flow batteries".INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER 186(2022).