Abstract
PBI-LiHzS composite membranes were prepared by casting N,N'-DMAc solutions containing PBI and LiHzS, where the LiHzS contents in the membranes were between 2.5 and 10 wt.-%. LiHzS was obtained by reacting hydrazine sulfate and lithium carbonate in water. PBI-LiHzS composite membranes were thermally stable up to approximately 300 °C and their acid-absorbing capabilities were comparable to those of the pure PBI membranes. The proton conductivity of PBILiHzS composite membranes (2.12×10-2 S·cm-1 at 180 °C and 0% RH) was higher than that of pure PBI membranes when used at the same acid doping levels. The mechanical stability of the composite membranes having less than 5 wt.-% of LiHzS was found to be close to that of pure PBI membranes.
Original language | English |
---|---|
Pages (from-to) | 1322-1329 |
Number of pages | 8 |
Journal | Macromolecular Chemistry and Physics |
Volume | 211 |
Issue number | 12 |
DOIs | |
State | Published - 15 Jun 2010 |
Keywords
- Composites
- Lithium hydrazinium sulfate
- Membranes
- PEMFC
- Polybenzimidazole