Sulfonated Polyether Ether Ketone (SPEEK, NEXIONIC) Powder for Flow Battery, Electrolyzer, and Fuel Cell, CFBEFCSPEEKP

Sulfonated Polyether Ether Ketone (SPEEK) in powder form 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	CFBEFCSPEEKP (C-FBEFC-SPEEKP)
Chemical Structure
Appearance	Off-white to slight yellow powder
Sulfonation Degree	60% (Other sulfonation degrees, such as 50 %, 70%, 80% can be supplied upon request)
Solubility	Dissolved in NMP, DMSO, DMF solvents
Package Grade	50 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.