Pyridine containing polymers fuel cells

There have been studies indicating that blends of PBI polymers with pyridine-containing polymers could prove useful in a high-temperature PEM fuel cell. Kallitsis et al. [31] combined commercially supplied w-PBI with an aromatic polyether that contained a pyridine moiety in the main chain (PPyPO) these polymer blends were then soaked in 85% wt PA. Dynamic mechanical analysis of a 75/25 PBl/PPyPO block copolymer showed reasonable mechanical strength and flexibility. The conductivity of this copolymer was not reported, but the conductivity of 85/15 PBI/PPyPO block copolymer was 0.013 S cm at a relatively low PA doping level. Further investigation of these systems is required to prove its utility as a fuel cell membrane. 

Pefldanakis, E.K., Deimede, V., Daletou, M.K., Gourdoupi, N., and Kallitsis, J.K. (2005) Novel polymer electrolyte membrane, based on pyridine containing poly(ether sulfone), for application in high temperature fuel cells. Macromol. Rapid Commun., 26, 1724-1728. 

Pefkianakis EK, Deimede V, Daletou MK et al (2005) Novel polymer electrolyte membrane, containing pyridine and tetramethyl biphenyl units, for application in high temperature PEM fuel cells. Macromoi Rapid Commun 26 1724-1728... 

Cleemann et al. [83] showed strong dependence of the fuel cell performance degradation on the catalyst supports. Graphitized carbon black and multi-walled carbon nanotubes as catalyst supports showed improvement in the catalyst and fuel cell durability. Further wrapping the carbon nanombes by a polymer, e.g., PBl [87] or pyridine-containing polybenzimidazole (PyPBl) was found to improve the utilization efficiency and durability. The... 

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