Fig. 3: Ion conductivity of membranes in response to electrolyte concentration and temperature and the contribution of potassium and hydroxide ions.
From: Sulfonated polybenzimidazole for low-alkalinity ion solvating membrane water electrolysis
a–f, Conductivity of KOH solutions43 and SOPBI at RT (a), of 50SOPBI before and after 48 h activation in 15 wt% KOH at 80 °C (b), of 50SOPBI-act at different temperatures (c), contribution of K+ and OH− to the total conductivity of 50SOPBI-act at 80 °C (d), the effect of anode concentration on the transference numbers (e) and conductivity of 50SOPBI-act in comparison to 60 literature data (f; Supplementary Tables 4 and 5), all in ≤1 M KOH, gas or water47.
