Alkali-stable polybenzimidazole anion exchange membranes tethered with N,N-dimethylpiperidinium cations for dilute aqueous KOH fed water electrolyzers

Piperidinium-functionalized polybenzimidazoles enable stable and significantly higher current densities in electrolyzers fed with dilute aq. KOH solutions than a commercial reference material with much higher electrolyte concentrations.