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6.27 Nyquist and semi-log Bode plots of the impedance recorded on a full cell of 0.1M DBEAQ adjusted to pH 12 against 0.15M K4[Fe(CN)6]+0.05M K3[Fe(CN)6] dissolved in 1.0M KCl adjusted to pH 12 at SOC values ran- gingfrom10to100%. .............................113 6.28 Illustration of the relation between the exchange current density and the charge transfer resistance as functions of the concentration of oxidised and reducedredoxspecies. .............................113 B.1 SynthesisrouteforPPAQ. ...........................139 C.1 RDEexperimentof5mMK3[Fe(CN)6]atpH7onaGCWE. . . . . . . . 141 C.2 RRDE experiment of 5mM K3[Fe(CN)6] in 1M KCl adjusted to pH 12 withKOHrecordedonGCandgoldWEs. ..................142 C.3 RRDE experiment of 5mM K4[Fe(CN)6] in 1M KCl adjusted to pH 12 withrecordedonGCandgoldWEs. .....................143 C.4 RDE experiment of 2.5mM DBEAQ in 1M KCl adjusted to pH 12 with KOHrecordedonagoldWE. .........................144 C.5 RRDE experiment of 2.5 mM DBEAQ in 1 M KCl adjusted to pH 12 with KOH recorded on GC and gold WEs. . . . . . . . . . . . . . . . . . . . . . 145 C.6 Polarisation and power density curves of 0.2 M DHAQ against 0.4 M K4[Fe(CN)6] in 1.0M KOH (repetition). . . . . . . . . . . . . . . . . . . . . . . . . . . . 145 D.1 SEM images of Sigracet 39AA before and after pretreatment. . . . . . . . . 148 E.1 Nyquist plots recorded on a one-container symmetric cell with 0.1 M/0.1 M [Fe(CN)6]3–/[Fe(CN)6]4– at five different temperatures and their corres- ponding CNLS fits. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153 E.2 Nyquist plots recorded on a one-container symmetric cell with 0.1 M/0.1 M [Fe(CN)6]3–/[Fe(CN)6]4– at nine different applied flow rates and their cor- respondingCNLSfits. .............................154 E.3 Nyquist plots recorded on a one-container symmetric cell with 0.1 M DHAQ at five different applied flow rates and their corresponding CNLS fits. . . . 155 E.4 Nyquist plots recorded on a one-container symmetric cell with 0.1 M DBEAQ at five different applied flow rates and their corresponding CNLS fits. . . . 156 List of Figures 131PDF Image | Organic Redox Flow Batteries 2023
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