Mobile phones Copper foilhas the function of isolating interference signals and eliminating static electricity, using the principle of electroplating.
Copper foil paper has the function of isolating interference signals and eliminating static electricity. If it is torn off, unstable hidden defects will occur. This copper part is connected to the heat pipe of the cell phone to dissipate heat.
Copper foil is a cathode electrolytic material, a thin, continuous metal sheet deposited on the base layer of the printed circuit board, which serves as a conductor for the PCB. It easily adheres to the insulating layer, accepts the printed protective layer, and forms circuit patterns after corrosion. It is an important material in the manufacture of copper-plated laminates and printed circuit boards.
Uses of copper foil
Copper foil has manylow surface oxygen characteristics and can be attached to various substrates, such as metals, insulating materials, etc., and has a wide temperature range. It is mainly used for electromagnetic and anti-static shielding. The conductive copper foil is placed on the surface of the substrate and combined with the metal substrate to have excellent conductivity and provide electromagnetic shielding effect.
Electronic grade copper foil is one of the basic materials in the electronics industry. The electronic information industry is developing rapidly and the use of electronic grade copper foil is increasing. communication equipment, quality assurance equipment, copper foil lithium-ion batteries, consumer televisions, VCRs, CD players, photocopiers, telephones, heating and cooling air conditioners, automobile electronic components, audio consolese games, etc.
Performance benefits, significantly improve the consistency of battery usage and significantly reduce battery costs. Improve the bond adhesion between active materials and current collectors and reduce the manufacturing cost of pole pieces. Reduce bias, increase rate and gram capacity, and improve battery performance. Protect the current collector and extend battery life.
Lithium batteries are difficult to dispose of. Are there more environmentally friendly ways to solve them?
Copper foil is divided into two types: electrolytic copper foil and laminated copper foil:
Electrolytic copper foil is made by passing direct current ( 30,000 to 5 amps ranging from 10,000 amps), a strip of copper foil laid and peeled off a rollcathodic. The thickness of the electrolytic copper foil is adjusted according to the size of the current and the rotation speed of the cathode roller. Generally, electrolytic copper foil is divided into standard copper foil and lithium battery copper foil according to its usage. Standard copper foil is generally thicker: over 12 microns, with a rough side and a shiny side. It is mainly used for copper-plated laminates, printed circuit boards, shielding, etc. Lithium battery copper foil is generally thinner: generally less than 12 microns, and mostly double-sided. There are also single-faced and double-faced wool. It is mainly used for lithium battery negative electrode current collectors.
Rolled copper foil refers to a strip-shaped copper foil that reaches the thicknessrequired after rolling the copper billet several times with rolling rollers. Most of them measure between 12 and 100 microns. The thickest are copper strips. which are less than 10 microns or even There is also a certain production quantity of 6 microns. After the laminated copper foil is produced, it is double-sided and is mainly used in transformers, FPCs, lithium batteries, etc. Nowadays, laminated copper foil is also used to produce smooth and double-sided laminated copper foil through surface treatment. Directly rolled copper foil is generally hard, with an elongation rate of about 1-2%. After delivery, it becomes soft rolled copper foil with an elongation rate above 5%.
Lithium batteries are a type of battery that uses lithium metal or lithium alloy as electrode materials.positive/negative and uses non-aqueous electrolyte solutions. They can be roughly divided into two categories: Lithium metal batteries. and lithium-ion batteries.
It does not rely on decaying electrodes for charging and discharging, but relies on the flow of lithium ions between the anode and cathode, allowing the lithium battery to be charged repeatedly hundreds of times before performance drops. .
What is a lithium battery? It refers to a secondary battery composed of two compounds capable of reversibly inserting and deintercalating lithium ions in the form of positive and negative electrodes, commonly known as a "lithium battery". The structure of lithium battery mainly includes: negative electrode, positive electrode, electrolyte and other auxiliary materials. The copper foil acts as a support for active materialss negative in lithium batteries. It also acts as a collecting and transmitting body for the flow of electrons from the negative electrode. Therefore, the tensile strength, compactness, surface roughness, extensibility, thickness uniformity and appearance quality of electrolytic copper foil have a great impact on the process of manufacturing and electrochemical performance. lithium batteries. Key role.
With the huge consumption of lithium batteries, the consumption of metal resources is quite large. If there is a practical method to recycle metals with high economic value and high content into lithium-ion batteries, it will not only obtain certain economic benefits, but also become resources. The use of lithium batteries has become common and a large number of discarded lithium batteries have become a pollution problem approx.irony that we must face. Our goal in lithium battery recycling is primarily to recover the useful metal components. Not only can it provide certain economic benefits, but it also constitutes a resource and hope for achieving sustainable development of humanity. After the lithium battery is crushed, the metal elements such as cobalt, copper and lithium contained in the battery can be recovered, and the pollution problem of lithium batteries can be solved to achieve economic recycling of the lithium batteries. resources.
Recycling used lithium batteries not only has environmental benefits, but also economic benefits. The precious metal components contained in different cathode materials of power lithium batteries are different, among them, the metals have the highest potential valueThese include cobalt, lithium, nickel, etc. In the future, as the demand for high energy density ternary batteries continues to increase, the demand for raw materials such as cobalt and lithium will also become more stringent. Therefore, recycling used lithium batteries and extracting precious metals such as nickel, cobalt and lithium for recycling is an effective way to avoid the risks of raw material shortages and upstream price fluctuations. , and present significant economic advantages.