Fig. 17.Properties and stability of POBP-ISMs. a. Hydroxide conductivity of membranes the function of KOH concentration and temperature. b. Comparison of area resistance (AR) at -35 °C -120 °C of different membranes: Zirfon, POBP-ISM, and PPS diaphragm. Reproduced with permission of Ref. [44]. Copyright 2024, nature.