fig6

Figure 6. (A) CE and capacity curves of the Fe-S RFB cell with PB in the catholyte and FMN-Na in the anolyte; (B) Voltage-capacity curves of the Fe-S RFBs before and after PB addition; (C) Wide operating temperature range of the proposed Fe-S RFB; (D) Comprehensive performance comparison between the present Fe-S RFB and previously reported systems. Figure 6D was generated based on the data reported in references^{[30,32,36,39,40,43-49]}. PB: Prussian blue; CE: Coulombic efficiency; Fe-S RFB: ferrocyanide-polysulfide redox flow battery; FMN-Na: flavin mononucleotide sodium salt.