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Capacity fade mitigation strategies Fig. S22 below contains the same data as depicted in Fig. 4 in the main text but plotted as absolute capacity rather than relative capacity. Figure S22. ( a 110 108 106 104 102 100 98 96 94 92 90 88 140 135 130 125 120 115 110 105 100 0.0 0.5 100 99 98 Charge Discharge Coulombic Efficiency change voltage cutoff from 1.25 to 1.6V to access >99% of the theoretical capacity b 012 Time (days) Aeration recovers capacity Reduction Oxidation 1.0 1.5 2.0 Time (days) 2.5 3.0 a) Limiting the state of charge reduces the rate of capacity loss in a negolyte-limited DHAQ-Fe(CN)6 full cell. Over the first 1.6 days, the operating state of charge was limited to 88% of the theoretical capacity (i.e., 88% DHAHQ and 12% DHAQ), and the capacity faded at only 0.14%/day. The right-hand segment reflects typical operating conditions (cycling to 99.9% of theoretical capacity), and the capacity faded at 5.6%/day. (b) Symmetric cell cycling in which the capacity-limiting side (5 mL of 0.1 M DHAQ in a 1.2 M KOH solution) demonstrates recovery of 70% of lost capacity after aeration of discharged electrolyte. 24 Capacity (C) Capacity (C) Efficiency (%)PDF Image | Extending organic flow batteries via redox state management
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