Date：2023.11.09
Source：Far East copper foil wechat public platform
Pageview：171
On November 7, the "14th China Electronic Copper Foil Technology and Market Seminar" was successfully held in Nanjing. This conference is sponsored by the China Electronic Materials Industry Association electronic copper foil material branch, China electronic Materials Industry Association copper clad plate material branch, China electronic Circuit Industry Association co-organized. The conference aims to strengthen the self-discipline of the industry, avoid vicious competition, promote the healthy development of the industry, in order to better face the increasingly severe international environment and complex and changing market situation. The conference was presided over by Leng Daguang, secretary-general of electronic copper foil Materials Branch of China Electronic Materials Industry Association.
Fu Wenfeng, senior partner of Far East Intelligent Energy Co., LTD. (Stock abbreviation: Far East Stock code: 600869), Managing director of Sunda Electric and General manager of Far East Copper Foil (Yibin) attended the conference; Han Haiya, senior partner of Far East Shares and head of Far East Copper Foil Composite Materials Research Institute, made a report of "Multi-functional composite fluid collecting materials", which introduced in detail the development of Far East copper foil, product details, product applications and advantages, and the analysis of current problems in the industry.
At the meeting, Han Haiya analyzed the problem points of the composite fluid collecting production process.
Han Haiya introduced, first of all, in the product specifications of multi-functional composite copper foil and multi-functional composite aluminum foil, according to industry standards, the thickness of the base film and the total thickness of the finished product and the square resistance standards that can be achieved are standardized and classified, and promised to strengthen customer linkage in the future, understand customers and applications, and customize development to meet the needs. Such as the introduction of PI substrate, composite aluminum foil super carbon coating to reduce internal resistance and other special products.
Subsequently, he focused on Far East copper foil to promote the new 2.5 generation composite copper and aluminum foil process route, one is the customized design and development of core equipment, which can not only solve the problem of low yield of the existing two-step method, but also greatly improve production efficiency; The second is the development of chemical deposition, which is aimed at the development of porous and multi-layer copper foil, and even overcome the composite copper and aluminum foil products used in the field of supercapacitors.
Han Haiya pointed out that the research and development process of composite aluminum foil, whether one-time film formation or multiple film formation, the ultimate goal is to achieve product physical property standards. After research and testing, the two-step, less times evaporation process is finally selected. He stressed that from the perspective of internal research, whether it is a one-step method, two-step method or three-step method, it is necessary to combine the process of internal excellence to do breakthrough research and development.
Secondly, he introduced that Far East copper foil has overcome two major technical problems.
On the one hand, Far East copper foil reviews the overall process, and has reached an agreement on the issue of whether the composite copper foil is PP or PET: In the early stage, the biggest problem encountered in the research and development according to the PP material base film is the problem of binding force, and the methods to improve the binding force are plasma treatment, chemical modification, surface coating and other programs, and a series of tests and verification are carried out. After continuous testing and verification, the comprehensive data shows that the current plasma treatment is followed by grafting to improve the surface roughness and achieve effective mechanical properties, so as to solve the problem of the binding force of PP composite fluid collector.
On the other hand, Far East Copper Foil develops and researches the follow-up welding of composite collector fluid materials, and uses ultrasonic rolling transfer welding to extract conductive foil, which has basically broken through the traditional welding method to achieve welding results that meet the requirements.
In the report, he showed the experiment on the difference between traditional copper foil and composite fluid collector and traditional fluid collector in the form of video, as well as the test of composite copper and aluminum foil on the soft pack battery, more intuitively showing that if composite copper foil and composite aluminum foil are used together, the energy density of the entire cell can be increased by 17.9%.
According to industry data, in a battery structure with a cell energy density of 250wh/kg and a battery system energy density of 200wh/kg, compared with 4.5 micron copper foil, the weight of the composite copper foil after complete replacement is 40% lighter, and the cell energy density is 9.8% higher than that of 6 micron copper foil.
He then introduced the application of composite fluid collector under market research. Multifunctional composite fluid materials can not only be applied in the lithium battery industry, but also be applied in the field of high-end FPC flexible circuit boards as FCCL substrates, because the current flexible circuit boards require more precision, more precise lines, many high-end products must be within 20 microns of line width and line distance, the current solution is to use thinning copper method and then line etching. If the use of multi-functional composite materials can be customized copper thickness according to customer needs to avoid copper waste.
In addition, multi-layer composite copper foil and aluminum foil can also be made, or porous composite copper foil can replace the existing original copper foil for application in the field of supercapacitors. In addition to the traditional liquid electrolyte, the composite fluid collector can also cooperate with solid state, condensed state, sodium-ion batteries, etc., to improve battery safety, energy density and environmental protection and other major performance indicators, in order to achieve the goal of cost reduction and efficiency.
Finally, he put forward the prospect of composite fluid collection: with the continuous technology research and development, equipment transformation, production line commissioning, investment and production in recent years, the technology is more mature, and the downstream market is gradually opened. Although some problems remain to be solved, these problems and their directions will become more and more clear after careful study.
