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Appendix E. Impedance Fitting 150 Table E.2: Best fit model parameters obtained from modelling the impedance of the blank Sigracet 39AA cells presented in Figure 6.6. a At 400 ◦C in air for 24 h; b adjusted with KOH. State of electrode Electrolyte Rs [Ω cm2] Q0 [S sn cm−2] q ρi [Ω cm] Pristine Pretreateda Pretreateda 1 M KCl 4.625 5.300 5.150 7.53 × 10−6 1.77 × 10−3 1.72 × 10−3 0.955 0.970 0.975 39.2 22.3 23.5 1 M KCl 1 M KCl @ pH 12b Table E.3: Best fit model parameters obtained from modelling the impedance spectra of the symmetric 0.1M K3[Fe(CN)6]/0.1M K4[Fe(CN)6] cell presented in Figure 6.12. T Rs L a f i0 Q0 q ρi NRC [◦C] [Ω cm2] 31 0.875 [A cm−2] 1.14 × 10−2 [S sn cm−2] 1.79 × 10−2 [unitless] [Ω cm] 0.973 4.88 22 32 0.850 33 0.835 34 0.820 35 0.805 1.80 × 10−8 1.80 × 10−8 1.79 × 10−8 1.78 × 10−8 1.78 × 10−8 1.72 × 10−3 1.73 × 10−3 1.76 × 10−3 1.72 × 10−3 1.72 × 10−3 3.81 × 10−1 3.81 × 10−1 3.84 × 10−1 3.87 × 10−1 3.92 × 10−1 1.19 × 10−2 1.13 × 10−2 1.25 × 10−2 1.21 × 10−2 1.74 × 10−2 1.54 × 10−2 1.75 × 10−2 1.71 × 10−2 0.978 4.77 22 0.982 4.31 21 0.980 4.69 21 0.976 4.47 22 [H] [cm] [unitless] [unitless] [unitless]PDF Image | Organic Redox Flow Batteries 2023
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