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Shenzhen Green Power Energy Battery Co.,ltd specializes in a wide range of digital battery such as environmental cylindrical 18650 21700 32700 26650 14500 18500 lithium ion rechargeable battery, LifePO4 battery, 3.7V lithium polymer battery, NiMH battery, NiCD battery, dry cell battery, alkaline battery, heavy duty battery, button cell battery etc. we devote to R&D, innovation, production & sales. With automatic production machines we have been exported goods to all over the world over 15years. We have complete exported certificate such as KC, CE, UL, BSCI, ROHS, BIS, SGS, PSE etc
Dongguan Datapower New Energy Co.,ltd is a high-tech production enterprise which specialize in the R&D and production&sale of lithium polymer batteries,drone battery,airplane batteries &battery pack etc.
Anhui Seong-hee New Energy Technology Co.,ltd is a high-tech production enterprise which specialize in the R&D and production of primary batteries. And mainly produces and sells alkaline batteries & carbon zinc batteries. there are size AA, AAA, C, D, 9V etc
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release time:2024-01-02 Hits: Popular:AG11 battery
Sinochem News reported on May 14 that the reporter learned from the research group of Professor Lu Hongbin of the Department of Polymer Science of Fudan University that the high-quality graphene heat dissipation film preparation and application project completed by the research group will provide graphene heat dissipation films to domestic and foreign customers. product. This heat dissipation film is expected to replace the existing high energy consumption and high cost polyimide (PI) artificial graphite film products and provide new heat dissipation solutions for wearable devices, flexible displays, high-power weapons and equipment, etc. Thermal films mainly include natural graphite heat dissipation film and polyimide artificial graphite film. Among them, natural graphite heat dissipation film products are difficult to reduce in thickness and have low thermal conductivity, so their use is increasingly limited. "Polyimide artificial graphite heat dissipation film is widely used in the market. Its thermal conductivity is generally 600~1500W/(m·K). The best quality product can reach about 1950W/(m·K). The thinnest The product can be as thin as 10 microns. However, the cost of this product is relatively high, with the cost per square meter being at least 400 yuan, and the yield rate during product processing is not high. During the die-cutting process, the edges of the film are prone to powder falling off and require hemming processing. It’s expensive,” Lu Hongbin said. In order to solve the above problems, Lu Hongbin's research group has innovated the preparation method and process route of graphene heat dissipation film, and developed a graphene preparation technology with high efficiency, high yield, high quality and differentiation, as well as a low-cost, continuous graphene heat dissipation film. Preparation technology. This technology uses a unique method of combining controlled expansion and oxidation of flake graphite, which can retain the flake size and flake structure of raw flake graphite to the greatest extent, so that the prepared graphene heat dissipation film has good thermal conductivity and mechanical properties. . "The high-quality graphene heat-dissipation film we prepared is made from natural graphite and is low-cost. The material thickness is controllable between 2 and 20 microns. It can also be bent continuously for more than 20,000 times without any degradation in performance. The process is also simplified to the greatest extent, improving production. efficiency, reducing energy consumption, environmental pollution and production costs, ensuring stable production of high-quality graphene cooling films." Lu Hongbin said. It is understood that graphene heat dissipation film products have good application prospects, with controllable thickness and excellent comprehensive performance, and can be widely used in heat management of various types of equipment such as smartphones, laptops, and communication base stations. With the continuous development of 5G communication equipment and LED equipment, the growth space of the heat dissipation film market will become wider and wider.
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