Nord's shares of microporous copper foil research and development successfully plan to build a broader new energy map

Lithium-ion batteries are the most dynamic and fastest-growing battery products in the battery market today. From a development perspective, the main challenge for battery manufacturers has been the continued consumer demand for greater energy density, regardless of volumetric energy density or the weight energy density.

With the continuous increase of energy density, power battery manufacturers have put forward higher requirements for copper foil, ultra-thin copper foil (≤6μm), high tensile strength copper foil, microporous copper foil, coated copper foil, etc. available. Although lithium-ion copper foil is tight, for copper foil companies, always keep up with the latest market demand to stand out in the constant market changes.

Recently, Nord's shares were re-transmitted to Jiaxun – the wholly-owned subsidiary Qinghai Electronic Materials Industry Development Co., Ltd. (hereinafter referred to as “Qinghai Electronics”) successfully developed and achieved mass production of microporous copper foil. While reducing the weight of lithium ion battery, greatly improve the battery capacity of lithium ion battery, has a significant role in promoting the technical upgrading of power battery industry.

In 2007, Qinghai Electronics entered the Dongchuan Industrial Park in the Economic and Technological Development Zone of Xining (National), and built a 25,000-ton high-grade electrolytic copper foil project in phases, which was completed in 2012. In recent years, the company has continuously improved the precision and output of lithium battery copper foil for the development of lithium battery industry. Through continuous improvement of technology and technology, it has taken the lead in breaking through the special copper foil for high-end lithium-ion batteries with a thickness of only 6 microns and a width of up to 1380 mm. Production process and mass production.

In particular, the 6 micron high tensile strength electrolytic copper foil has been successfully used in lithium ion batteries, which has excellent downstream processing performance and can withstand the expansion stress caused by charge and discharge heat, thereby greatly improving the life of the lithium ion battery. In 2018, the company's 6-micron lithium-ion battery dedicated electrolytic copper foil production will reach half of the company's total output, the company's main customers include LG, CATL, BYD and other global lithium battery industry giants, always standing in the first echelon of lithium battery copper suppliers.

With the implementation of the Qinghai 100 billion lithium battery industry plan and the rapid development and future development trend of the global lithium battery industry, Qinghai Electronic Materials Industry Development Co., Ltd. is aiming at the cutting edge of technology and high-end products again, and successfully trial-produced microporous copper in March this year. Foil, the world's first. That is, the second deep processing is performed on the basis of the original lithium battery copper foil having a thickness of 6 to 9 micrometers and the physical and chemical properties of the copper foil itself are kept substantially unchanged, and at the same time, the high elongation and tensile strength can be maintained.

Copper foil aperture, opening ratio and width can be customized according to customer's actual needs, the aperture range can reach 30 to 120 microns, and the opening ratio can reach 20% to 70%. It can be used as a conductive current collector for lithium ion batteries, solid state lithium ion batteries, lithium ion capacitors, super capacitors, etc., and is suitable for nickel cadmium, nickel metal hydride batteries, and the like.

At present, Nord's perforated copper foil series products have passed various performance tests, and the same area foil material can reduce the weight by 20% to 70%, thereby improving the specific energy of lithium ion batteries.

In the case of the same volume of lithium battery, if the anode current collector uses a hole-electrolytic copper foil, the following four effects can be achieved:

First, the pores can increase the surface area, can accommodate more anode materials, and increase the lithium battery capacity.

Second, the contact area of the porous copper foil and the negative electrode material is increased, and the viscosity of the copper foil and the negative electrode material is improved, which can prevent the negative electrode material from falling off after the battery is charged and discharged, thereby obtaining a higher capacity retention rate and prolonging the battery life.

The third is to make up for uneven coating. Lithium ions can freely move between the two faces by using pores in the porous electrolytic copper foil, so that lithium ions move from the concentrated region to the sparse zone to compensate for uneven coating.

Fourth, in general, the unit weight per hole electrolytic copper foil is longer than the non-porous electrolytic copper foil, and the perforated electrolytic copper foil per unit length can be cut into more pole pieces, saving the user's use and purchase cost.

The electrolytic copper foil produced by NORD has a uniform dialysis rate and no burr, and the physical properties of the copper foil are stable, which is superior to the laser or mechanical punching technology on the market. At the same time, through the "anchor" bonding formed between the pores of the foil, the adhesion of the functional coating, the infiltration efficiency and the consistency of the infiltration are greatly improved, thereby significantly improving the high rate discharge performance of the lithium ion battery.

In the future, NORD will continue to focus on the new energy vehicle market, relying on years of experience in R&D and manufacturing of electrolytic copper foil to continuously explore and innovate and develop more products that are close to the future market development trend. According to the plan, in the future, Nord will rely on the field of copper foil to plan to build a broader new energy map.

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