Polymer electrolytes sulfonated polyether ether ketone

S. M. J. Ztiidi, S. D. Mikhailenko tmd S. Kaliaguine, Sulfonated polyether ether ketone based composite polymer electrolyte membranes, Catal. Today 67, 225-236 (2001). 

Kumar, R., Mamlouk, M., Scott, K., Sulfonated polyether ether ketone-sulfonated graphene oxide composite membranes for polymer electrolyte fuel cells, RSC Adv., 2014, 4, 617-623. 

In addition to Nafion-based catalyst layers, additional types have been developed, including CLs with different ion exchange capacities (lECs) [57,58] or with other hydrocarbon-type ionomers such as sulfonated poly(ether ether ketone) [58-60], sulfonated polysulfone [61,62], sulfonated polyether ionomers [63], and borosiloxane electrolytes [64], as well as sulfonated polyimide [65]. These nonfluorinated polymer materials have been targeted to reduce cost and/or increase operating temperature. Unfortunately, such CLs still encounter problems with low Pt utilization, flooding, and inferior performance compared wifh convenfional Nafion-based CLs. 

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