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Innovative PVDF Electrode Binders from Solvay Enhance Li-ion Batteries’ Performance

Published on 2016-11-09. Author : SpecialChem

Solef® 5140 binder combines the effect of ultra-high molecular weight with the benefit of the polar functional groups distributed in the fluoropolymer chain, resulting in superior adhesion properties for xEV batteries with higher energy density and lower internal resistance at significantly reduced binder content.
Solef® 5140 binder combines the effect of ultra-high molecular weight with the
benefit of the polar functional groups distributed in the fluoropolymer chain, resulting
in superior adhesion properties for xEV batteries with higher energy density and
lower internal resistance at significantly reduced binder content.
BOLLATE, Italy -- Solvay has featured at K 2016 a new innovative Solef® polyvinylidene fluoride (PVDF) electrode binders designed to boost the electrical performance of high-energy lithium-ion batteries (Li-ion) for hybrid as well as pure Electric Vehicles (xEV).

High-Energy Li-ion Battery for EVs


Prakash Raman, Global Business Development Manager Li ion Battery, Solvay’s Specialty Polymers Global Business Unit, said:
“Battery suppliers are under tough demands from auto OEMs to enhance the performance of lithium-ion batteries for the expanding xEV market. For electric vehicles to gain a wider market share, the energy density of current lithium-ion batteries must be greatly enhanced to compete with the range and autonomy provided by conventional combustion engines. With specific focus on these needs, our new Solef® 5140 electrode binders deliver superior adhesion and outstanding performance particularly in high nickel-content cathode materials for the high-energy xEV drives.”

Solef® 5140 PVDF Electrode Binders


  • Solef® 5140 electrode binders are prepared using a unique proprietary polymerization technology that allows Solvay to chemically modify the PVDF polymer and achieve ultra-high molecular weight in a tightly controlled process. 
  • These features result in enhanced adhesion and cohesion properties required for high energy electrode binder formulations for xEV battery applications. 

High-performance Solvay materials at the heart of a lithium-ion battery: The PVDF separator coating helps to maintain the lamination among separator and electrodes even at high temperature, while binders ensure the electrode integrity during cycling. Advanced electrolyte additives enhance the life, capacity and safety of the cell.
High-performance Solvay materials at the heart of a lithium-ion battery: The PVDF
separator coating helps to maintain the lamination among separator and electrodes even at
high temperature, while binders ensure the electrode integrity during cycling.
Advanced electrolyte additives enhance the life, capacity and safety of the cell.

Key Features of Solef® 5140


  • In addition, Solef® 5140 offers the highest cohesion between the active material particles as well as the conductive agents to ensure longer cycle life and achieve higher energy density, at even lower binder addition than ever. 
  • Its polar functional groups distributed in the fluoropolymer chain also result in lower internal resistance. 
  • Long-term stability is ensured by the binder’s excellent chemical resistance in the aggressive environment of Li-ion cells, which includes organic carbonates and lithium salts. 
  • The new binder grade extends the existing family of Solvay’s proven Solef® 5130 and Solef® 5120 PVDF binders for cathodes and anodes.

This new Solef® grade displays excellent performance in the high nickel (Ni) content of state-of-the-art Ni-Mn-Co (NMC) and Ni-Co-Al (NCA) high energy cathodes, especially to resist the formation of gel during slurry preparation, which distinguishes them from competitive grades.

Prakash Raman added:
“As a leading supplier of advanced materials for the lithium-ion battery market, we have developed water based latex PVDF emulsions and been dedicated to its continuous elaboration, helping customers to eliminate the need for organic solvents and minimize the costs associated with solvent recovery and re-purification”.

Complementary technologies from Solvay designed to reduce weight, enhance the structural strength and maximize the electrical efficiency of xEV Li-ion battery module/packs include a broad range of proven high-performance polymer compounds, separator coating materials and functional additives for electrolyte.

® Registered trademark of Solvay.

About Solvay Specialty Polymers


Solvay Specialty Polymers manufactures over 1.500 products across 35 brands of high-performance polymers – fluoropolymers, fluoroelastomers, fluorinated fluids, semi-aromatic polyamides, sulfone polymers, aromatic ultra-high performance polymers, high-barrier polymers and cross-linked high-performance compounds – for use in Aerospace, Alternative Energy, Automotive, Healthcare, Membranes, Oil and Gas, Packaging, Plumbing, Semiconductors, Wire & Cable, and other industries.

About Solvay


An international chemical and advanced materials company, Solvay assists its customers in innovating, developing and delivering high-value, sustainable products and solutions which consume less energy and reduce CO2 emissions, optimize the use of resources and improve the quality of life. Solvay serves diversified global end markets, including automotive and aerospace, consumer goods and healthcare, energy and environment, electricity and electronics, building and construction as well as industrial applications.

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Source: Solvay
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