PET composite copper foil

PET composite copper foil is a kind of polyester film (PET) as the base material, covered on the surface of copper foil composite material. PET film is a transparent, temperature-resistant, chemical corrosion-resistant, and easy-to-process polyester film and copper foil is a kind of metal material with good electrical and thermal conductivity, by bonding PET film and copper foil together, you can make PET composite copper foil, which has good mechanical strength and electrical conductivity but also has good corrosion resistance and oxidation resistance.
Composite copper foil is a new type of fluid-collecting material for power batteries, mainly composed of 3 parts, the middle layer for PET, PP, PI, and other materials of the basic film, the film on both sides of the thickness of about 1μm copper, is mainly a sandwich type structure.

PET composite copper foil Features

High mechanical strength: composite copper foil has high strength and toughness, and can cope with complex mechanical stress and environmental stress, to improve the stability and reliability of products.
High safety: the structure of the battery is that both the positive and negative electrodes are made of metal, and there is a diaphragm in the middle. The metal materials will fatigue and fracture due to repeated use so some metal materials will Pierce the diaphragm and cause a short circuit in the battery. The PET composite copper foil solution to this problem is that the polymer is not easy to break
Excellent electrical conductivity and plasticity.

In lithium-ion batteries, composite copper foil is widely used as a positive collector fluid, which can provide better conductance and conductivity, which is conducive to improving the energy density and cycle life of the battery. At the same time, composite copper foil can also provide better corrosion resistance and mechanical strength, thus improving battery stability and reliability.
In polymer lithium-ion batteries, composite copper foil is used as a negative collector fluid, which can provide better conductivity and conductivity, resulting in improved battery energy density and cycle life. At the same time, composite copper foil can also provide better corrosion resistance and mechanical strength, thus improving battery stability and reliability.
Composite copper foil can be combined with other metal materials to form composite materials, which can be applied to aviation, photovoltaic, LED, automotive electronics, medical instruments, and other fields.

Compared with traditional copper foil, PET composite copper foil has four major advantages:

High safety: the plastic diaphragm in the middle of the composite copper foil can greatly improve the combustion safety of the battery.
High specific capacity: under the same circumstances, the amount of copper is only the same as the original, and part of the copper is replaced by plastic, which reduces the weight of the battery and improves the energy density of the battery.
Long life: Reducing the active substance shedding caused by metal shrinkage can improve the cycle life of the battery.
Strong compatibility: suitable for lithium battery environment.