Partnering forgreener energy
With industry partners, we develop polymers
for more efficient batteries with higher energy
density.

BATTERYAPPLICATIONSELECTROLYTE
Specialtypolymer as solidstate electrolyte

CATHODE
Binder/additives
for cathode
Dispersantin carbon
black/CNTANODE

SEPARATORBATTERY CASING

Binder for Si-anode

Resin forseparator
coatingUV coating as
alternative to blue insulation
film on battery cell

Phenolic resin asprecursor/additives
for anode

Resin for adhesives andcoatings for battery packWhat‘s already there – existing solutions
for lithium-ion batteries (LIBs)
In addition to newly developedsolutions, allnex offers a wide
variety of existing products
suitable for enhancing themanufacture andperformance of LIBs:

UV/EB-curable acrylateoligomers and monomers
from our EBECRYL® range

Thermal plastic phenolic resinsfrom our ALVONOL® range

Dispersants from ourADDITOL® range

Amino resin crosslinkers
from our CYMEL® andSETAMINE® ranges

Innovation example – Anode binder (WB PAA)ANODE ACTIVE
MATERIAL

Performance characteristics− High molecular weight, strong bonding force− Excellent thermal stability and electrochemical stability− Suitable for silicon-carbon anodes

ANODE (Cu)SEPARATOR− Strong resistance to electrolyte− Excellent adhesion strength

BINDERIn response to market requirements for highercapacity lithium-ion batteries, allnex has developed
a water-based binder that helps suppress Si-anode
expansion over charge-discharge cycles.

POUCH CELL TESTINGTYPICAL PARAMETERS

In pouch cell testing with aSi-anode, allnex’s binder showed
better cycling performance thanother water-based binders inthe market.

Solvent

Water

Appearance

Translucent liquid

Solid content

5.0 %Viscosity at 23 °C

1,500 mPa·s

pH at 25 °C

8.2

allnex binder

Specificcapacity[mAh g -1]

Coulombicefficiency[%]

Control binder

600
1005000.2 C8040060300402002010000050100150200Cycle number

Innovation example – Cathode co-binder/additives
CATHODE ACTIVE
MATERIAL

Performance characteristics− Significantly improved capacity retention at high-voltage cycling
in batteries using various cathode materials (NCM/LMNO)

SEPARATOR− Inhibits decomposition of electrolyte on cathode surface

CATHODE (AI)− Less dissolution of transition metals (Ni/Co/Mn) in cathode anddeposition on anode, preventing increase of internal impedance− Reduces PVDF
In response to the market demand for lithium-ion batteries
with higher capacities, eco-friendly materials and fastercharging rates, allnex has developed cathode binder/additive
solutions that meet these needs.

BINDERCARBON

POUCH CELL TESTING

With allnex‘s additive NCM811 – X611 (0.75 %)Dissolution
[ppm]
500

Pristine

458.96400
320.98
300

200

100
13.27
0

9.73

25.03

17.50

EB X611

Discharge
capacity[mAh g -1]

Coulombic
efficiency[%]

Pristine

600100500800.5 C
2.8–4.5 V

400

70.45 %
(985 cycles)

300

6040200100

49.16 %
(1000 cycles)

20000200

400

600

800

1000Cycle number

In pouch cell testing at 0.5 C in the voltage range of 2.8–4.5 V,
using allnex’s additive solution for cathodes resulted in better
cycling performance than pure PVDF.

LNMO-PVDF/X611

Discharge
capacity[mAh g -1]

Coulombic
efficiency[%]

LNMO-PVDF

200

100
0.5 C (1C = 150 mA g-1)
3.5–5.0 V

150

80
60

1000.2 C
4050

2000050

100

150

200Cycle numberEnhancing e-mobility –Our solutions for better batteries
UV/EB-curable coatings− Usually consist of epoxy acrylate oligomer/urethane
acrylate oligomer/monomer/adhesive promoter/photoinitiator/blue pigment and other additives− allnex EBECRYL® product range can be used

12

UV/EB-curable coating instead of blue insulation tape for cell case
− Better production efficiency− Better electrolyte resistance− Better shear strength

UV/EB-curable coating instead of powder coating for cell case
− Safer protection for case (applied after cell assembly/can cover all sides)− Energy savings− Easier to rework if needed− Higher first-pass yieldHydrophobic polyols for 2KPU battery pack adhesive:− Bio-based and 100% active component− Good adhesion strength to metal and cell insulative film
− Good elongation and tensile strength− Good resistance to hot humidity− Various grades available with viscosity from low to high andsuits formula of adhesive with different thermal conductivity

Allnex Management GmbHThe Squaire 13, Am Flughafen
60549 Frankfurt am Main, Germany
Contact:
May Zeng
Email: may.zeng@allnex.com
Phone: +86 216404 8011 ext. 524

Want to know more?
The QR-code leads to our
web page where you’ll findmore information.
www.allnex.com

Disclaimer: allnex Group companies (‘allnex’) exclude all liability with respect to the use made by anyone of theinformation contained herein. The information contained herein represents allnex’s best knowledge but does notconstitute any express or implied guarantee or warranty as to the accuracy, the completeness or relevance of thedata set out herein. Nothing contained herein shall be construed as conferring any license or right under any patentor other intellectual property rights of allnex or of any third party. The information relating to the products is given
for information purposes only. No guarantee or warranty is provided that the product and/or information is suitable
for any specific use, performance or result. Any unauthorized use of the product or information may infringe theintellectual property rights of allnex, including its patent rights. The user should perform his/her own tests todetermine the suitability for a particular purpose. The final choice of use of a product and/or information as wellas the investigation of any possible violation of intellectual property rights or misappropriation of trade secrets ofallnex and/or third parties remain the sole responsibility of the user.
Notice: Trademarks indicated with ® , TM or * as well as the allnex name and logo are registered, unregistered orpending trademarks of Allnex Netherlands B.V. or its directly or indirectly affiliated allnex Group companies.
©2023 allnex Group. All Rights Reserved.