Polymer Science Series C

, Volume 51, Issue 1, pp 8–11 | Cite as

New polybenzimidazoles for producing medium-temperature proton-exchange membranes

  • A. Yu. Leikin
  • A. L. Rusanov


H3PO4-doped proton-exchange membranes based on benzimidazole-2-yl-substituted polybenzimidazoles have been obtained and studied. Attempts have been made to stabilize the mechanical properties of doped membranes by crosslinking of the initial polymers. The treatment with sulfuric acid is selected as the most efficient crosslinking method. Target characteristics (proton conductivity and performance in the fuel cell) of a membrane based on crosslinked benzimidazole-2-yl-substituted polybenzimidazole have been investigated. The proton conductivity of the membrane is estimated as 5.2 × 10−2 S/cm at 160°C. The current density in a hydrogen—air fuel cell based on the developed membrane is found to be 0.21 A/cm2 at 160°C, 0.6 V, with a total platinum content on electrodes of 1 mg/cm2.


Polymer Science Series DMAA Membrane Electrode Assembly Urotropine Pyrophosphoric Acid 
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Copyright information

© Pleiades Publishing, Ltd. 2009

Authors and Affiliations

  1. 1.Engineering Center of Hydrogen Technologies and Alternative EnergeticsNational Innovation Company New Energy ProjectsMoscowRussia
  2. 2.Nesmeyanov Institute of Organoelement CompoundsRussian Academy of SciencesMoscowRussia

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