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Solef® PVDF

A copolymer used to coat the separator in li-ion batteries for extending battery life

August 2019
Gallery Solef® PVDF 1
Gallery Solef® PVDF 1


Solef® PVDF is a copolymer used to coat the separator in Li-Ion batteries with an additional layer in order to extend cycle life etc.

The copolymer is a fluorinated semi-crystalline thermoplastic which is obtained by polymerizing vinylidene fluoride. Without any additives, it has the intrinsic stability inherent to fluoropolymers even when exposed to harsh environments, providing the user with a combination of properties resulting in longer equipment life. In order to extend cycle life with a better interface between electrodes and separator as well as to achieve enhanced wettability and easy assembly, the separator can be coated with an additional layer of Solef® PVDF. This coating can either be solvent based or water based. Solef® PVDF copolymer is normally used in separator coating, because it is easier for copolymer to develop good adhesion to the electrode at a certain lamination condition and it can be dissolved in a wider range of solvents. The solution can be formulated with ceramic or used alone to coat the polyolefin porous substrate.

Label Date August 23, 2019
By Solvay
From Belgium
Maturity stage Medium and large scale commercialization
Looking For Promotion, visibility

The environmental benefits

  • Can be under continuous use within a wide range of temperatures.
  • Can be applied to the automotive industry and its transition to eco-friendly vehicles.

The Financial benefits

  • Longer shelf-life while shortening charging time.

Activity Region

  • /
  • Headquarters
  • Activity

Company Profile


Solvay is a global company driven by proud and committed chemists. Asking more from chemistry.

View company profile
Headquarters 1000 Brussels, Belgium
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The information set out above, is solely for the purposes of information and the Solar Impulse Foundation does not provide any guarantee as to its authenticity, completeness or accuracy. This information does not constitute investment advice or a recommendation to buy into, transact or to enter into any agreement with any of the parties or persons mentioned above. Potential investors or interested parties are solely responsible for their investment or business decisions and for performing any due diligence required by the circumstances. The innovator Solvay has asserted ownership of the intellectual property rights for images, videos, and content showcased above, affirming full and unrestricted usage rights, and has provided explicit permission for the Solar Impulse Foundation to publish such information designated as "public" in the application form.