Effect of Flow Field Geometry on Hydrodynamics of Flow in Redox Flow Battery

In this paper, we present experimental studies of electrochemical performance of an all-vanadium redox flow battery cell employing an active area of 103 cm2, activated carbon felt, and a novel flow field, which ensures good electrolyte circulation at low pressure drops. Extended testing over 151 consecutive charge/discharge cycles has shown steady performance with an energy efficiency of 84% and capacity fade of only 0.26% per cycle. Peak power density of 193 mW cm−2 has been obtained at an electrolyte circulation rate of 114 ml min−1, which corresponds to stoichiometric factor of 4.6. The present configuration of the cell shows 20% improved in peak power and 30% reduction in pressure drop when compared to a similar cell with a different electrode and a serpentine flow field.

Download Full-text

A 3D macro-segment network model for vanadium redox flow battery with serpentine flow field

Electrochimica Acta ◽

10.1016/j.electacta.2021.139657 ◽

2021 ◽

pp. 139657

Author(s):

Yu-Hang Jiao ◽

Meng-Yue Lu ◽

Wei-Wei Yang ◽

Xin-Yuan Tang ◽

Miao Ye ◽

...

Keyword(s):

Flow Field ◽

Network Model ◽

Vanadium Redox Flow Battery ◽

Redox Flow Battery ◽

Flow Battery ◽

Serpentine Flow Field ◽

Vanadium Redox

Download Full-text

Three dimensional multi-physical modeling study of interdigitated flow field in porous electrode for vanadium redox flow battery

Journal of Power Sources ◽

10.1016/j.jpowsour.2019.227023 ◽

2019 ◽

Vol 438 ◽

pp. 227023 ◽

Cited By ~ 5

Author(s):

Cong Yin ◽

Yan Gao ◽

Guangyou Xie ◽

Ting Li ◽

Hao Tang

Keyword(s):

Flow Field ◽

Physical Modeling ◽

Porous Electrode ◽

Three Dimensional ◽

Vanadium Redox Flow Battery ◽

Redox Flow Battery ◽

Flow Battery ◽

Interdigitated Flow Field ◽

Vanadium Redox ◽

Modeling Study

Download Full-text

Numerical Simulation and Experiment on the Electrolyte Flow Distribution for All Vanadium Redox Flow Battery

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.236-238.604 ◽

2011 ◽

Vol 236-238 ◽

pp. 604-607 ◽

Cited By ~ 20

Author(s):

Jin Qing Chen ◽

Bao Guo Wang ◽

Hong Ling Lv

Keyword(s):

Flow Field ◽

Flow Distribution ◽

Parallel Flow ◽

Vanadium Redox Flow Battery ◽

Redox Flow Battery ◽

Flow Battery ◽

Electrolyte Flow ◽

Cfd Method ◽

The Impact ◽

Vanadium Redox

The electrolyte flow states of all vanadium redox flow battery (VRB) have a direct effect on the battery performance and life. To reveal the electrolyte distribution in the battery, the computation fluid dynamics (CFD) method was used to simulate a parallel flow field. A hydraulics experiment and a battery performance experiment were carried out to confirm the simulated results. The results show that the predicted information agreed well with the experimental results. The electrolyte has a concentrated distribution in the central region of the parallel flow field and the disturbed flow and then vortex flow areas mainly appear in the inlet and outlet regions. The higher flux of electrolyte is helpful to uniform the distributions and to reduce the impact of flow irregularity on the battery performance. The battery with the flow field generates a power density of 15.9 mW∙cm-2, and the coulombic, voltage and energy efficiency is up to 90.5%, 74.0% and 67.2% at a current density of 20 mA·cm-2.

Download Full-text