What are the product characteristics of copper foil and the production process of copper foil?

Copper foil has low surface oxygen characteristics, can adhere to a variety of different substrates, such as metals, insulating materials, etc., and has a wide range of temperatures. Mainly used in electromagnetic shielding and antistatic, the conductive copper foil is placed on the substrate surface, combined with the metal substrate, with excellent conductivity and provides the effect of electromagnetic shielding. It can be divided into:

Self-adhesive copper foil, double guide copper foil, single guide copper foil, etc. Electronic grade copper foil (purity or above, thickness 5um-105um) is one of the basic materials of the electronic industry, the rapid development of the electronic information industry, the use of electronic grade copper foil is increasing, the products are widely used in industrial calculators, communication equipment, QA equipment, lithium-ion batteries, civil televisions, video recorders, CD players, copiers, air conditioning, automotive electronic components, game consoles, etc. The demand for electronic grade copper foil, especially high-performance electronic grade copper foil, is increasing in domestic and foreign markets.

By 2015, China's domestic demand for electronic grade copper foil will reach 300,000 tons, and China will become the world's largest manufacturing base for printed circuit boards and copper foils.

Performance advantages of carbon-coated copper foil.

1.Significantly improve the consistency of battery pack use and greatly reduce the cost of battery pack.

Significantly reduce the increase of dynamic internal resistance of the cell; Improve the differential pressure consistency of the battery pack; Extend the life of the battery pack;

2.Improve the adhesion of active materials and current collectors, and reduce the manufacturing cost of pole pieces. Such as:

improve the adhesion of cathode materials and collectors using aqueous systems; Improve the adhesion of cathode materials and collectors at the nanometer or submicron scale; Improve the adhesion of lithium titanate or other high-capacity anode materials and collectors;

Improve the qualified rate of pole pieces and reduce the manufacturing cost of pole pieces.

Test diagram of adhesion of battery pole pieces with carbon-coated aluminum foil and light foil.

After using carbon-coated aluminum foil, the adhesion of the electrode piece is increased from 10gf to 60gf (with tape or 100 grid knife method), and the adhesion is significantly improved.

3.Reduce polarization, increase rate and gram capacity, and improve battery performance. Such as:

Partially reduce the proportion of adhesive in the active material and increase the gram capacity; Improve the electrical contact between the active substance and the current collector; Reduced polarization and improved power performance.

Battery rate performance diagram of different aluminum foils.

Among them, C-Al is carbon-coated aluminum foil, E-Al is etched aluminum foil, and U-Al is light aluminum foil.

4.Protects the current collector and extends battery life. Such as:

Prevent collector corrosion and oxidation;Improve the surface tension of the collector electrode and enhance the easy coating performance of the collectorIt can replace the more expensive etched foil or replace the original standard foil with a thinner foil.

Battery cycle plots for different aluminum foils (200 cycles).

Among them, (1) is light aluminum foil, (2) is etched aluminum foil, and (3) is carbon coated aluminum foil.

1.Excellent electrical conductivity: Copper foil is an excellent conductive material with high electrical conductivity. This makes copper foils widely used in electronic fields such as circuit boards (PCBs), electronic components, wires, etc., to support current conduction and signal transmission.

2.Good thermal conductivity: Copper foil has good thermal conductivity and can effectively conduct heat. This makes copper foil ideal for applications such as heat sinks, thermal conductive plates, chip heat dissipation, and more.

3.Good plasticity: Copper foil has good plasticity and machinability, and can be easily bent, folded, and molded into various shapes. This makes copper foil widely used in decoration, arts, crafts, and other precision applications.

4.Good corrosion resistance: Copper foil has high corrosion resistance and can resist the corrosion of most chemical media, including acids, alkalis and salts. This makes copper foil widely used in food packaging, the chemical industry and marine engineering.

5.High reflectivity: Copper foil has high reflectivity and has a good reflection effect on electromagnetic waves. Therefore, copper foil is used in optical applications to prepare mirrors, optical lenses, anti-reflective coatings, etc.

6.High temperature resistance: Copper foil can withstand relatively high temperatures and has good heat resistance. This makes copper foil widely used in high-temperature applications such as aerospace, thermal industry, and power transmission.

Copper foilThe production process is:Electrolytic copperfoil and calendered copper foil.

Electrolytic copper foil is to make copper sulfate solution from copper raw materials, and then use electrolysis equipment to convert copper sulfate solution into direct current.

under the effect of electrodeposition. Rolled copper foil is a product made by repeatedly rolling and annealing high-precision copper strip (usually less than 150 microns thick) using the principle of plastic processing.

Application of copper foil production process

Electrolytic copper is widely used in electrical, light industry, machinery manufacturing, construction industry, national defense industry and other fields, second only to aluminum in the consumption of non-ferrous metal materials in China. Calendered copper foil has higher strength, bendability, and ductility than electrolytic copper foil.

It is widely used in electronic appliances, communications, integrated circuits, automobiles, machinery manufacturing, construction and other industries, and is an irreplaceable raw material or substrate for some products.

What is copper foil for lithium battery? Lithium battery copper foil ** analysis. As the current collector of lithium battery anode, lithium battery copper foil accounts for 5%-8% of the cost of lithium battery, and is an important lithium battery material.

At present, the 8 m lithium battery copper foil in the digital lithium battery and power battery market competition is becoming increasingly fierce, a new round of entrants in order to quickly occupy the market, the first battle is in full swing.

What is copper foil for lithium battery? Copper foil not only acts as a carrier of the negative electrode active substance, but also acts as a collector and transporter of the negative electron flow in lithium batteries, so the tensile strength of electrolytic copper foil is electrolyzed.

Elongation, compactness, surface roughness.

thickness uniformity and appearance quality are also on lithium-ion batteries.

The anode manufacturing process and the electrochemical performance of lithium-ion batteries have a great impact.

The so-called lithium battery copper foil acts as an anode material in lithium batteries.

The carrier and anode current collector are important materials for lithium batteries. The harsh working environment and performance requirements of lithium batteries put forward many requirements for the thickness, oxidation resistance and adhesion properties of copper foil. Due to its good conductivity, soft texture, mature manufacturing technology, and relatively low price, lithium battery copper foil has naturally become the preferred material for the anode current collector of lithium-ion batteries.

The basic properties of lithium batteries are closely related to the materials of the entire battery system. For the anode, in addition to the anode active material, the quality of the copper foil also has a great impact on the anode manufacturing process and battery performance.

Electronic and electrical applications: Due to its excellent conductivity, copper foil is often used as a conductive layer for printed circuit boards (PCBs). Copper foil can be used as a substrate for conductive circuits in the manufacture of electronic products such as electronic devices, communication equipment, and computers.

Electromagnetic shielding: Copper foil has good electromagnetic shielding performance, which can be used to prepare electromagnetic shielding materials to block or reduce the interference of electromagnetic waves. Copper foil shielding materials are widely used in electronic equipment, electromagnetic shielded rooms, communication systems, and medical equipment.

Thermal conductivity material: The high thermal conductivity of copper foil makes it an excellent thermal conductivity material. It is commonly used in heat sinks, thermal conductive plates, chip heat dissipation, and other fields to effectively conduct and dissipate heat.

Decorative and artistic applications: Due to the metallic luster and plasticity of copper foil, it is widely used in the decorative and artistic fields. Copper foil can be used to make ornaments, sculptures, painting backgrounds, crafts, etc., giving a unique look and texture to the work.

Packaging material: The softness and corrosion resistance of copper foil make Yofuqi an ideal packaging material. It can be used in food packaging, pharmaceutical packaging, electronic component packaging and other fields, providing good shielding and protection performance.

There are two types of copper foil: electrolytic copper foil and rolled copper foil

Electrolytic copper foil is a strip copper foil formed by direct current (ranging from 30,000 to 50,000 amperes) between the cathode (roller) and the anode (plate), deposited on the cathode roller and peeled off. The thickness of the electrolytic copper foil is adjusted by the current and the speed of the cathode roller. Generally, electrolytic copper foil is divided into standard copper foil and lithium battery copper foil according to the application.

Standard copper foil is generally thicker: more than 12 microns, rough on one side and bright on the other, mainly used for copper clad laminates, printed circuit boards, shielding, etc. Lithium battery copper foil is generally thinner:

Most of them are below 12 microns, and most of them are double-sided light, and there are also single-sided and double-sided hairs, which are mainly used for lithium battery anode current collectors.

Calendered copper foil refers to the strip copper foil that reaches the required thickness after the copper billet is rolled by rolling rolls many times, mostly 12-100 microns, and then the thickness is the copper strip, and there is a certain amount of production under 10 microns or even 6 microns. After the calendered copper foil is produced, it is double-sided light, which is mainly used for transformers, FPCs, lithium batteries, etc. Now there are also calendered copper foil with surface treatment to produce rolled copper foil with one light and one hair, double-sided hair.

The directly rolled rolled rolled copper foil is generally in a hard state, with an elongation of about 1-2%, and becomes a soft rolled copper foil after return, and the elongation can reach more than 5%.

Copper foil is made of copper plus a certain proportion of other metals, copper foil generally has 90 foil and 88 foil, that is, the copper content is 90% and 88%, the size is 16 * 16cm Copper foil is the most widely used decorative material. Such as: hotels, temples and Buddha statues, gold-lettered signboards, tile mosaics, handicrafts, etc.;

The manufacturing process of electrolytic copper foil. First, the copper is dissolved into a copper sulfate solution, and then poured into the electrolysis equipment, under the action of the electrode, ion migration occurs in the solution, and the copper gradually precipitates on the slowly rotating cathode roller to form the original foil. The side where the original foil and the cathode roller are in contact is smoother and is called the smooth surface, and the other side is not in contact with the roller and is rougher, which is called the rough surface.

If the rotation speed of the cathode roller is adjusted reasonably, copper foil of different thicknesses can be obtained.

In order to prevent oxidation of the original foil, surface treatment is usually applied. The surface treatment of red copper foil is copper plating, and the surface treatment of gray copper foil is galvanized. Therefore, copper foil is a composite material and cannot be considered an alloy. The main material is copper, and the surface is plated with a thin layer of other metals.

Most of them are copper, and some have alloys on them, and different metals are added according to different effects, but in general, copper prevails.

Introduction to the definition of copper foil:

Copper foil: It is a kind of cathodotic electrolytic material, a thin and continuous metal foil precipitated on the substrate of the circuit board, which acts as a conductor of PCB. It is easy to bond to the insulating layer, accept the printed protective layer, and form a circuit pattern after corrosion.

Copper Mirror Test: A flux corrosivity test that uses a vacuum-precipitated film on a glass plate.

Copper foil: A cathodotic electrolytic material that is deposited on the substrate of a circuit board as a thin, continuous layer of metal foil, which acts as a PCB.

Copper foil is a conductor of electricity. It is easy to bond to the insulating layer, accept the printed protective layer, and form a circuit pattern after corrosion. Copper Mirror Test:

A flux corrosivity test using a vacuum-precipitated film on a glass plate.

Copper foil, electrolytic copper foil should be mainly used in digital cameras, mobile phones, high-quality electronic products, computer communications, wires, cables, high-frequency transmission, isolation of electromagnetic interference, circuit conduction path, because of the excellent conductivity of copper, mostly used for low attenuation requirements, performance is better than cable aluminum foil Mylar, etc.

Recommend a company specializing in the production and sales of copper foil Suzhou Taiyuan Technology,

Shielding and isolation of special shielded cables, printed circuit boards, wire coils, and transformers all require copper foil.