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2.2. Quinone-Based Electrolytes 15 Table 2.2: Molecular electrochemistry literature values of the quinones presented in this chapter (top section). Literature values of compounds relevant for discussions in later chapters are also included (bottom section). (a) twin-electrode thin-layer method; (b) rotating disk electrode method; (c) cyclic voltammetry peak analysis method. Species State Concen- tration Solvent pH Redox potential Diffusion coefficient [cm2 s−1] Standard rate constant [cm s−1] Transfer Reference coefficient BQDS Red 50 AQDS Ox 1 DHAQ Ox 1 DBEAQ Ox 5 DPPEAQ Ox 5 3MH2SO4 1MH2SO4 1MKOH 1MKOH 1MKOH 0 0.904 2.2×10−7 (b) 3.8×10−6 (b) NA NA [23] 0.474(b) [27] NA [29] NA [24] NA [25] HQ Red 1 Ox 1 Ox 5.09 1M H2SO4 1MKOH 1M KCl 1M KCl 1M KOH 1M KOH 1M H2SO4 1.8M H2SO4 0 0.683 14 −0.72 7 NA 7.1×10−6 (b) 6.7×10−4 (b) 2.12×10−3 (b) NA NA NA NA 1.71×10−5 (c) 7.5×10−4 (c) NA [54] NA [32] NA [55] NA [55] NA [56] NA [56] DHBQ 3.66 × 10−6 (b) [Fe(CN)6]3– 7.05 × 10−6 (a) [Fe(CN)6]4– Red 5.23 Ox 5 Red 5 7 NA 14 NA 14 NA 6.68 × 10−6 (a) [Fe(CN)6]3– 6.59 × 10−6 (b) [Fe(CN)6]4– V3+ Ox 120 Ox 55 0 −0.586 0 0.85 6.15 × 10−6 (b) 0.6(c) [57] NA [58] V2O5 1.41 × 10−6 (c) 1.4×10−6 (c) [mM] [V] vs. SHE [unitless] 0 0.213 14 −0.684 14 −0.515 14 −0.47 4.8×10−6 (b) 1.58 × 10−6 (b) 7.2×10−3 (b) NA NA NA 1.37 × 10−6 (b)PDF Image | Organic Redox Flow Batteries 2023
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