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Concentration effects on capacity fade Fig. S15 depicts results of an experiment in which a symmetric cell was initially cycled with 0.1 M DHAQ in a 1.2 M KOH solution, resulting in a fade rate of ~8%/day. The electrolyte was subsequently diluted 10x with 1 M KOH, some volume was removed, and cycling continued. At 0.01 M DHAQ, the cell fade was ~4.2%/day. The electrolyte was diluted 10x again with 1 M KOH, volume was again removed, and cycling continued. At 0.001 M DHAQ, the fade rate was ~1.9%/day. These differences could be due to either a decrease in the rate of disproportionation/DHA formation or due to a decrease in the dimerization rate. ab c Figure S15. Symmetric cell cycling of (a) 6 mL of 0.1 M DHAQ in a 1.2 M KOH solution, showing a capacity fade rate of ~8.0%/day, (b) 6.5 mL of 0.01 M DHAQ in a 1.02 M KOH solution, showing a capacity fade rate of ~4.2%/day, and (c) 8 mL of 0.001 M DHAQ in a 1 M KOH solution, showing a capacity fade rate of ~1.9%/day. 17PDF Image | Extending organic flow batteries via redox state management
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