Aquivion® PW79S-Li is a coarse powder based on the short-side-chain (SSC) copolymer of Tetrafluoroethylene and the Sulfonyl Fluoride Vinyl Ether (SFVE) CF2=CF-O-(CF2)2-SO2F produced by Solvay. The resulting perfluoropolymer's functional groups are in their lithium sulfonate form, SO3Li. Aquivion® PW79S-Li is chemically stabilized (denoted by the S-suffix). This material is characterized by a low equivalent weight and a high ionic exchange capacity. It is insoluble in water, acids or bases and in most solvents unless extreme conditions would be applied. Aquivion® PW79S-Li can be mechanically processed into blends, films or substrate coatings and preferably accompanied or followed by a heat treatment. Furthermore, It can be dissolved in organic solvents that are dipolar aprotic such as N-ethyl-2-pyrrolidone (NEP) and dimethyl sulfoxide. To facilitate the dissolution, slightly increase the temperature to 50-60°C. For casting processes you can also consider Aquivion® D79-25BS-Li dispersion. Please visit for more information.


  • Global Business Unit
    Specialty Polymers
  • Brand
  • Synonyms
    PFSA Lithium Salt


Segments Applications
Electrification Battery Systems

Chemical categories

Chemical category Chemical family Chemical product
Specialty Polymers Perfluorosulfonic Acids Perfluorosulfonic acid

Region of commercial availability

  • Asia / Pacific
  • Europe / Middle East / Africa
  • North America
Not available in Middle East/Africa

Download documentation for Aquivion® PW79S-Li