Fluoropolymer PVDF Powder PVDF for Lithium Battery Binder
The binder is an inactive component in the electrode sheet of the lithium ion battery,and its main function is to connect the eletrode active material,the conductive agent and the electrode current collector,so as to have an overall connectivity between the electrode active material,the conductive agent and the current collector,there by reducing the impedance of the small electrode.
According to the dispersion of the binder in the electrode,it can be divided into point type,line type and body type.
Currently commonly used binders are;CMC,PVDF,PTFE,SBR,Aqueous bider LA132/133,BAP-L.
PVDF 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.
Physical
Item
|
Typical Value Unit
|
density
|
1.75 to 1.
78
g/cm3
|
Water Absorption(23ºC,24hr)
|
<0.
20
%
|
Mechanical
Item
|
Typical Value Unit
|
Tensile Modulus
4
(23ºC,)
|
1000
to
1500
Mpa
|
Thermal
Item
|
Typical Value Unit
|
Glass Transition Temperature
|
-40.0ºC
|
Melting Temperature
|
1
60
-1
68
ºC
|
Peak Crystallization Temperature(DSC)
|
135
to
140
ºC
|
Heat stability
|
>375
ºC
|
Heat of Fusion
|
4
0.0 to
48
.0 j/g
|
We could supply
one stop solution
( turn key project)
for you.
1.
Full set of lithium battery materials
,including :
LiMn2O4,LTO,LiNiMnCoO2(NMC),LiCoO2,Graphite(MCMB)and other cathode&anode battery materials;Aluminum foil,copper foils,battery separator,etc.
2.
Full set of lithium battery equipments
,for example:
mixing machine --coating machine--oven--rolling machine--welding machine--slitting / cutiing machine --winding machine--sealed machine,etc.
3.
Full set of lithium battery technology
.
we can design the laboratory and production line,according to customer's request.