Fig. 4: Electrochemical performances of the Cys-AE|| K4Fe(CN)6 AORFBs at high concentrations. | Nature Communications

Fig. 4: Electrochemical performances of the Cys-AE|| K4Fe(CN)6 AORFBs at high concentrations.

From: Artificial α-amino acid based on cysteine grafted natural aloe-emodin for aqueous organic redox flow batteries

Fig. 4: Electrochemical performances of the Cys-AE|| K4Fe(CN)6 AORFBs at high concentrations.The alternative text for this image may have been generated using AI.

a Galvanostatic charge-discharge curves of the Cys-AE|| K4Fe(CN)6 AORFB at current densities of 20, 50, 100, 150, and 200 mA cm−2, respectively. b Discharge capacity, Coulombic efficiency, and energy efficiency of Cys-AE|| K4Fe(CN)6 AORFB at varied current densities. c Polarization curves of the Cys-AE|| K4Fe(CN)6 AORFB at varied SOCs. d OCV versus SOC curve of the Cys-AE|| K4Fe(CN)6 AORFB. e Self-discharge test at 100% SOC. The battery was rested for 24 h after being fully charged at the 810th cycle. f Corresponding charge−discharge curves from the 809th to the 812th cycle. g Long-term cycling performance of the Cys-AE|| K4Fe(CN)6 at a current density of 100 mA cm−2 for the entire 804 cycles. h Long-term cycling performance of the Cys-AE|| K4Fe(CN)6 under galvanostatic-potentiostatic mode for the entire 592 cycles. The Cys-AE|| K4Fe(CN)6 AORFBs were assembled with 6 mL of 0.5 M Cys-AE in 1.0 M KOH solution (negolyte) and 30 mL of 0.4 M K4Fe(CN)6 in 1.0 M KOH solution (posolyte).

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