SPEEK/polyimide blends for proton conductivemembranes

H. Maab, M. Schieda, W. Yave, S. Shishatskiy, S. P. Nunes

Research output: Contribution to journalArticlepeer-review

17 Scopus citations


A series of membranes, based on sulphonated poly(ether ether ketone) (SPEEK)/polyimide (PI) blends, was prepared at different casting conditions. They were characterised by SEM, FTIR, DMTA, DSC, TGA, water/methanol pervaporation and impedance spectroscopy. The membranes prepared at 130 °C from blends with 10, 20 and 30 wt.-% of PI are homogeneous, and the methanol permeabilities decreased from 28 × 10-10 kg m s-1 m-2 (plain SPEEK) to 7.21,2.61 and 0.55 × 10-10 kg m s-1 m-2, respectively. This corresponds to a 4- to 57-fold methanol crossover reduction. With this improvement, by the introduction of PI, the power density of SPEEK-based membranes in DMFC tests could be greatly improved.

Original languageEnglish (US)
Pages (from-to)401-409
Number of pages9
JournalFuel Cells
Issue number4
StatePublished - Aug 2009
Externally publishedYes


  • DMFC
  • FTIR spectroscopy
  • Impedance spectroscopy
  • Polyimide

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology


Dive into the research topics of 'SPEEK/polyimide blends for proton conductivemembranes'. Together they form a unique fingerprint.

Cite this