CR2032 button cell batteries copper foil technology, lithium battery copper foil industry demand

　　CR2032 button cell batteries copper foil technology, lithium battery copper foil industry demand. As a new generation of green high-energy rechargeable batteries, lithium-ion batteries have outstanding advantages such as high voltage, high energy density, good cycle performance, small self-discharge, and no memory effect. They have achieved rapid development in the past 10 years. The rapid development of lithium-ion batteries has led to the development of related industries. Copper foil is a key material for manufacturing negative electrode current collectors of lithium batteries. Its quality directly affects the manufacturing process, performance and production cost of lithium-ion batteries. The following will introduce CR2032 button cell batteries copper foil technology and the demand for lithium battery copper foil industry.

　　CR2032 button cell batteries copper foil technology

　　Copper foil is one of the key materials for the production of lithium-ion batteries, and its quality directly affects the battery process and performance. Initially, copper foil was only used in the production of PCB boards, and was divided into two extraction processes: calendering production and electrolytic production. Because the former has the disadvantages of long process, high cost, and poor consistency, electrolytic copper foil is currently used as the comparison globally. Consistent preparation method.

　　In order to ensure that the negative electrode material coated on the electrolytic copper foil will not fall off, a suitable binder must be added during preparation. It is understood that currently commonly used adhesives are PVDF, PTFE, SBR, LA133, etc. The bonding strength not only depends on the physical and chemical properties of the adhesive itself, but also has a great relationship with the surface properties of the copper foil. When the bonding strength of the coating is high enough, it can prevent the negative electrode from pulverizing and falling off during charge and discharge cycles, or peeling off the substrate due to excessive expansion and contraction, reducing the cycle capacity retention rate. On the other hand, if the bonding strength does not meet the requirements, as the number of cycles increases, the internal impedance of the battery will continue to increase due to the increased peeling of the coating, and the cycle capacity will decrease even more.

　　Lithium battery copper foil industry demand

　　Judging from the production capacity and output data of the global copper foil material industry: production capacity increased from 591,000 tons in 2011 to 632,000 tons in 2016, with a compound annual growth rate of 1.35%; output increased from 350,400 tons in 2016 to 2016 of 506,300 tons, with a compound annual growth rate of 7.64%. Although the global production capacity has basically not grown much in recent years, the industry's output has been steadily increasing, and the capacity utilization rate has also gradually increased, from 60% in 2011 to 80% in 2016. It can be seen that the industry's supply is slowly decreasing. Several years of excess turned to stable supply and demand.

　　my country's copper foil production capacity increased from 232,700 tons in 2011 to 329,000 tons in 2016, with a compound annual growth rate of 7.17%, and output increased from 194,300 tons in 2011 to 291,600 tons in 2016, with a compound annual growth rate of 8.46 %, the growth data of production capacity and output in recent years are better than the global average. In terms of domestic capacity utilization, it has basically remained at around 80% in recent years, which is significantly better than global industry data.

　　It is predicted that the demand for 6-micron lithium battery copper foil will at least double next year compared with this year. The large release of 6-micron orders may cause the supply of high-end products in the market to exceed demand. Firstly, there are not many companies that can supply on the market. Secondly, the production capacities of the companies that can supply vary. Whether they produce 100 tons or 1,000 tons per month, there are huge production capacity constraints.

　　The development trend of copper foil for lithium-ion batteries

　　With the extensive application of electronic products, higher requirements have been placed on the specifications and quality of lithium-ion batteries, which has also brought new opportunities for the development of the CR2032 button cell batteries industry and the copper foil industry. At the same time, the performance and quality of copper foil Put forward higher requirements:

　　1. Copper foil has higher performance, precision and consistency requirements;

　　2. Thinner to meet the high volume capacity requirements of lithium-ion batteries. The current direction is to develop copper foil with a thickness less than 9m;

　　3. Microscopically treat the surface to enhance the anti-oxidation, anti-corrosion and electrical conductivity capabilities, as well as the adhesion strength to the negative active material;

　　4. In order to meet the needs of polymer lithium-ion batteries and high-capacity alloy anode materials, develop two-dimensional or even three-dimensional copper foil.

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