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(a). The conductivity of SPAEKS-X/PWA-IL membranes at 80 °C during 30 days (b). Illustration of two proton transport mechanisms in SPAEKS-X/PWA-IL membranes. (c) Methanol permeability of composite membranes and Nafion® 117 at room temperature. Reproduced with permission from [106]. Copyright Elsevier, 2017.
