The effects of design parameters on the charge-discharge performance of iron-chromium redox flow batteries

Y.K. Zeng, T.S. Zhao, X.L. Zhou, L. Zeng and L. Wei

Applied Energy, 2016, vol. 182, issue C, 204-209

Abstract: The objective of this work is to understand and identify key design parameters that influence the battery performance of iron-chromium redox flow batteries (ICRFBs). The investigated parameters include the membrane thickness, electrode compression ratio, electrode pretreatment and catalyst loading. Results show that: (i) with a thin NR-211 membrane and a high electrode compression ratio of 62.5%, the operating current density of the ICRFB can reach as high as 480mAcm−2 at an energy efficiency of higher than 80%; (ii) the bismuth catalyst loading has insignificant effect on the battery performance in the range of 0.52–10.45mgcm−2; (iii) the moderately oxidative thermal pretreatment of the electrode improves the energy efficiency compared to the as-received electrode while the electrode prepared with a harsh pretreatment deteriorates the battery performance; and (iv) for the present ICRFBs operating at both 25°C and 65°C, the dominant loss is identified to be ohmic loss rather than kinetics loss.

Keywords: Flow batteries; Iron-chromium redox flow batteries; Battery performance; Energy efficiency; Energy storage (search for similar items in EconPapers)
Date: 2016
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (14)

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DOI: 10.1016/j.apenergy.2016.08.135

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