Application of PI Copper Foil PEEK, LCP, FCCL Copper Foil in Lithium Battery Separators

PI coated copper foil-PEEK, LCP, FCCL laminated copper foil exhibits excellent flexibility, mechanical properties, chemical resistance, and heat resistance;

Excellent dimensional stability and processing formability.

Excellent electrical characteristics

Excellent peel strength

Thermoplastic resin system, directly hot-melt composite, with good processability, suitable for the design of flexible multilayer boards

 

application

Traditional flexible circuit board

High density flexible circuit board

satellite communication

Filters, couplers, low-noise amplifiers, power amplifiers

Aviation Electronics and Aerospace

Satellite signal transmission equipment

Base station antenna and power amplifier

 

Physical and chemical properties:

Test project	unit	XJY-25	XJY-50	test method
Glass transition temperature (Tg)	℃	<300	>350	DSC
flame resistance	-	VTM-0	VTM-0	UL 94
tensile strength	MPa	> 180	> 250	IPC-TM-650, 2.4.19
Elongation rate	%	> 50	>40	IPC-TM-650, 2.4.19
peelstrength	N/mm	1.2	1.2	IPC-TM-650 2.4.8
CTE (X/Y/Z)	ppm/℃	18±2	18±2	IPC-TM-650 2.4.24
Surface Resistivity	Ω	>1014	>1014	IPC-TM-650, 2.5.17.1
Volume resistivity	Ω.cm	>1014	>1014	IPC-TM-650, 2.5.17.1
Thermal	W/(m.k)	0.28-0.30	0.28-0.30	ASTM-D5470
breakdown voltage	KV/mm	>5	>5	IPC-TM-650, 2.5.6.2

 

Double sided PI coated copper foil

category

Double sided PI-FCCL

Product series: XJY-25 series; XJY-50 series

 

		XJY-MP series				XJY-HP series
		XJY-15	XJY-20	XJY-25	XJY-50	XJY-HP15	LDH-02012	LDH-02512	LDH-05012
dielectric layer	material	PI-M series				PI-H series
	thickness	15µm	20µm	25µm	50µm	15µm	20µm	25µm	50µm
copper foil	material	Electrolytic or rolled copper foil (ED/RA)				Electrolytic or rolled copper foil (ED/RA)
	thickness	12µm				12µm
notes		Roll width: 250mm; 520mm; The thickness and type of copper foil can be customized according to customer requirements.

 

PI coated copper foilThe tensile strength, elongation, surface roughness, surface quality, thickness uniformity, oxidation resistance, and corrosion resistance of lithium batteries will significantly affect the yield, battery capacity, internal resistance, and cycle life of lithium batteries. With the continuous improvement of market requirements for copper foil performance, lithium battery copper foil has undergone development from porous electrolytic copper foil, carbon coated copper foil, high-performance copper foil to ultra-thin copper foil.

In recent years, the industrialization process of PI PP PET composite copper foil, which can further improve battery energy density, reduce battery weight, lower manufacturing costs, and enhance safety, has accelerated and is expected to become the main material for negative electrode current collectors in the future.

Composite copper foil refers to a new type of material made by uniformly depositing copper on the surface of plastic films such as PET, PP, PI using magnetron sputtering, evaporation, ion exchange, and other methods.

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