biostudies-literatureUnknown8(16)Kabtamu DMAtomic Energy CouncilInstitute of Nuclear Energy ResearchIn this paper, we propose a new, abundant, cost-effective, non-toxic, and environmentally benign iron-copper redox flow battery (Fe/Cu RFB), which employs Fe²⁺/Fe³⁺ and Cu⁺/Cu⁰ as the positive and negative electrolytes, respectively. The effect of graphite felt (GF) electrode modification and addition of Bi³⁺ into the electrolytes on the performance of the Fe/Cu RFB were investigated. It was found that the cell containing Bi³⁺ in the electrolytes revealed higher coulombic efficiency (89.18%) and energy efficiency (35.24%) than the cell without Bi³⁺ (CE = 84.10% and EE = 34.43%) at 20 mA cm^-2. This is because after adding Bi³⁺, Cu metal precipitation was not observed on the electrode surface, RSC advances8537-8543https://www.ebi.ac.uk/biostudies/studies/S-EPMC9078536biostudies-literatureThe effect of adding Bi³⁺ on the performance of a newly developed iron-copper redox flow battery.PMC9078536Wei HJWang CHChou YSHsu NYChen HYLin GYKabtamu DMChang YCHuang HCfalseThe effect of adding Bi³⁺ on the performance of a newly developed iron-copper redox flow battery.In this paper, we propose a new, abundant, cost-effective, non-toxic, and environmentally benign iron-copper redox flow battery (Fe/Cu RFB), which employs Fe²⁺/Fe³⁺ and Cu⁺/Cu⁰ as the positive and negative electrolytes, respectively. The effect of graphite felt (GF) electrode modification and addition of Bi³⁺ into the electrolytes on the performance of the Fe/Cu RFB were investigated. It was found that the cell containing Bi³⁺ in the electrolytes revealed higher coulombic efficiency (89.18%) and energy efficiency (35.24%) than the cell without Bi³⁺ (CE = 84.10% and EE = 34.43%) at 20 mA cm^-2. This is because after adding Bi³⁺, Cu metal precipitation was not observed on the electrode surface, 2018-01-01T00:00:00Z2018 Feb2025-04-04T20:50:16.681Z2025-02-19T03:25:00.537ZS-EPMC90785363553985710.1039/c7ra12926b