Additive for LiB - PVB Binder Dispersant -

PVB系バインダー/分散材 - LiB用添加剤
PVB-based additive with excellent adhesion and dispersibility, contributing to improved battery properties and productivity
Improved battery performance
Product category Environment

Additive for LiB - PVB Binder Dispersant -

-Challenge-  Improved battery characteristics with higher output and capacity

With the increasing capacity of lithium-ion batteries and their expanding use in automotive applications, there is a growing demand for improved battery safety, yet poor dispersibility due to the use of high-viscosity materials and negative effects on cycle characteristics caused by current interruption remain issues. As the electric vehicle (EV) market expands, there is an urgent need to develop materials that can support higher output and higher capacity. Why is it necessary to use high-viscosity materials?


-Solution-  PVB resin with excellent adhesion and dispersibility

Our product offers excellent adhesion and three times the peel strength of conventional binders. Along with a wide range of organic solvents, it dissolves in water, enabling low-viscosity and high-solidity content even with materials that are difficult to disperse. By contributing to NMP reduction and dispersion stabilization, and by changing the weight ratio of the three chemical units, the chemical and physical properties can be altered. What are the advantages of using this product at cell?


-Technology-  Technical information

Technical information

Technical overview

  Superior adhesiveness

Peeling Strength

You can have 3 times peel strength comparing to
current binder with superior adhesiveness.

 Excellent dispersibility

Process effective

Low viscosity and high solid differentiation
are achieved even with
difficult-to-dispersible materials.
It contributes to reduction of NMP
and stabilization of dispersions.


Soluble in a wide variety of solvents

Dissolves not only in a wide range of
organic solvents, water as well.

 Structure of PVB

The weight ratio of the three chemical units
can be changed to alter the chemical and
physical properties.
Structure of PVB

Technical details

 Superior adhesiveness

Even a small amount of binder is sufficient for full functionality

Adding 25% PVB to PVDF reduces overall 25 % of resin content.

Formulation of binder content

Binder content in cathode [wt%]

Adhesion properties

Optimal materials for high power/high capacity

Reduced amount of resin reduces current alienation and contributes to increased concentration of active
and conductive materials without adversely affecting cycle characteristics.

Cathode composite resistivity

Discharge rate properties

Cycle properties

 Excellent dispersibilityContribution of lower viscosity and 
higher solid differentiation that affects process cost.

For CNT slurry
[mixing ratio(wt%)] MWCNT/PVP or PVB/NMP = 4/1.5/94.5
Rheology of CNT paste
Dispersion stability
(Viscosity increase rate after 7 days)
For cathode(LFP) slurry
[mixing ratio(wt%)] LFP/AB/PVDF = 94/2/4, LFP/AB/PVDF + PVB = 95/2/3
Rheology of cathode paste
Samples Solid of
Viscosity (Pa . S)
1(1/s) 100(1/s)
PVDF 58 323.7 9
PVDF + PVB 65 15.9 2.4

Contributes to high solid content, reduces 7% of NMP solution, and shortens drying time

The addition of PVB resin can create a slurry with low viscosity that retains dispersion well.

Document download


Name Type File Update File

Catalog:Additive for LiB - PVB Binder Dispersant -_SekisuiMobilitySolution


pdf 2023-09-11
Download 1.24 MB