Sulfonated Polyether Ether Ketone (SPEEK, NEXIONIC) Slurry (10 wt% NMP-Based) for Flow Battery, Electrolyzer, and Fuel Cell, 50-200 g/bottle, CFBEFCSPEEKS

Sulfonated Polyether Ether Ketone (SPEEK) slurry is a versatile ion-exchange material used to fabricate membranes for fuel cells, redox flow batteries, and water electrolysis. It is favored as a low-cost, environmentally friendly alternative to perfluorinated membranes like Nafion. SPEEK is produced by the sulfonation of PEEK (Polyether Ether Ketone) powder. PEEK itself is hydrophobic and non-conductive; by treating it with concentrated sulfuric acid (H2SO4), sulfonic acid groups (-SO3H) are attached to the polymer backbone. Its main application in electrochemistry is as ion-exchange membrane for redox flow battery, electrolyzer, and fuel cell. 

Part Number	CFBEFCSPEEKS (C-FBEFC-SPEEKS)
Chemical Structure
Appearance	slight yellow solution (NMP as solvent)
Sulfonation Degree	60% (other sulfonation degrees, such as 40%, 50%, 65%, 70%, and 75% can be supplied upon request)
Concentration	10 wt%
Package Grade	50 g, 100 g, and 200 g/bottle

References

(1）Q. Luo, et al., Preparation and characterization of Nafion/SPEEK layered composite membrane and its application in vanadium redox flow battery, J. Membrane Sci., 2008, 325, 553-558. 

(2) T. Huang, et al., Impact of SPEEK on PEEK membranes: Demixing, morphology and performance enhancement in lithium membrane extraction, J. Membrane Sci., 2020, 615, 118448.