期刊
ENERGIES
卷 7, 期 9, 页码 5863-5873出版社
MDPI
DOI: 10.3390/en7095863
关键词
all-vanadium flow battery; state of charge (SOC); limiting current density; mass transfer
资金
- Bureau of Energy, Ministry of Economic Affairs, Taiwan
- Institute of Nuclear Energy Research of Taiwan [103-D0115]
All-vanadium redox flow batteries (VRFBs) are used as energy storage systems for intermittent renewable power sources. The performance of VRFBs depends on materials of key components and operating conditions, such as current density, electrolyte flow rate and electrolyte composition. Mass transfer overpotential is affected by the electrolyte flow rate and electrolyte composition, which is related to the limiting current density. In order to investigate the effect of operating conditions on mass transport overpotential, this study established a relationship between the limiting current density and operating conditions. First, electrolyte solutions with different states of charge were prepared and used for a single cell to obtain discharging polarization curves under various operating conditions. The experimental results were then analyzed and are discussed in this paper. Finally, this paper proposes a limiting current density as a function of operating conditions. The result helps predict the effect of operating condition on the cell performance in a mathematical model.
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