"The excellent electrical conductivity of graphene determines its great potential in the field of power batteries." Meng Fanyou, chairman of the Austrian Crown Group, which will realize the small-volume production of power batteries using graphene materials next year, told reporters that power batteries are one of the new energy fields. The main products, its performance improvement is related to the promotion and application process of environmentally friendly products such as electric vehicles and electric buses in China. "Graphene materials are mixed with traditional battery materials, which can significantly improve battery charge and discharge, cycle life, etc., and help China's environmental protection development. This is also the winning point for power battery companies in the new round of market competition in the world." But Meng Fanyou also said There is still a way to go to truly realize the maximum performance improvement of graphene materials for power batteries. Graphene application is a research hotspot in the power battery industry China's power battery technology has reached the international advanced level. "Many medium-sized battery companies in China have basic international R&D capabilities. For example, the AOC's R&D team is in Germany, and the research and development topics are basically researched in parallel with Germany." Meng Fanyou said that German battery technology is almost international battery technology. The highest point. At present, the German battery industry is working hard to develop graphene application technology, which is also a research hotspot in the battery industry in the world. "Currently, China's research results and research level on graphene applications are no worse than those in the UK and Australia." He believes that in the new round of market competition, graphene application technology may become the key to the success of power battery companies around the world. point. "At the current average production level, graphene materials can increase the conductivity of power batteries by about 20% and cycle life by 20% to 30%. Thus, power batteries will be more suitable for electric vehicles." Meng Fanyou said, the application of graphite After the olefin, the power battery can be filled with 80% of electricity in 20 minutes. He explained that this is because graphene can overcome the resistance impedance and make the current flow more smoothly into the battery active material, thus shortening the battery charging time and increasing the battery cycle life. “The application of graphene materials will increase the production cost by 7% to 8%, and increase the sales price by about 20%.†Meng Fanyou said that for large-scale enterprises, this cost increase is not too large. He stressed that users pay special attention to the stability and power improvement of the power battery. In the case of 20% improvement in conductivity, users do not think that the price of new products is high. Meng Fanyou said that at present, the company's power battery using graphene materials has been trial run in Beijing, Jiangsu Suqian, Shandong Dezhou and other places. In September next year, the company will be able to apply the product in small quantities to the electric vehicle field. “However, the specific promotion activities will depend on the actual operating curve and safety performance of the product during the year,†he said. Graphene application effect is different from expected The application of graphene materials cannot be done overnight. At present, there is still a gap between the application effect of graphene and expectations, and it is still necessary to continue to tackle the problem. “First, how much amount of graphene material can be added to achieve the highest product cost performance, which needs further study.†Meng Fanyou said that after mixing a certain amount of traditional battery materials with a certain amount of graphene, the conductivity of the battery will increase to an upper limit. . In theory, traditional battery materials and graphene are both carbon, and the addition of graphene does not have a negative impact on the battery itself. "But due to the upper limit of performance improvement, the use of graphene will only increase production costs without meaning." He stressed that the industry needs to further explore the optimal mixing ratio of traditional battery materials and graphene to achieve the highest cost performance. “In addition, the application of graphene materials has also challenged the traditional battery production process and process.†Meng Fanyou said that graphene can be mixed evenly in a vacuum environment. But even if it is mixed in a vacuum environment, the new product can only achieve full 20 minutes of full charge and increase the cycle life by about 20%. There is still a gap between the theoretically expected 10 minutes of full charge and the goal of increasing cycle life by more than 50%. . “Graphite application technology and process need to be further improved and improved.†Meng Fanyou said that not only that, but also the processing technology of graphene materials for different types of power battery needs to be refined. He said that the colloidal battery and lithium iron phosphate battery produced by the Austrian crown are examples. The operation process of the two graphene materials is very different. The market is increasingly demanding power batteries using graphene materials. “In addition to requiring fast charge and release, it is also required to have greater environmental adaptability.†Meng Fanyou said that it has customers who want to work in an environment of minus 20 degrees Celsius and 60 degrees Celsius. We are making a new round. Technical research. Meng Fanyou also said that at present, all enterprises of scale have entered the field of graphene application research and development, but the vast majority are staying in the laboratory stage. “Even if a company produces a product, the company cannot provide effective data on where graphene improves product performance and how much it is improved.†Meng Fanyou said that although multi-layer graphene can meet the current market performance improvement of power battery The demand, but for the power battery, the finer the graphene particles, the smaller the amount, the better the conductivity improvement effect. Therefore, he prefers to apply single-layer graphene. "However, under the current level of manufacturing equipment in China, there is no guarantee that single-layer graphene will be supplied." He said that the development of power battery technology using graphene materials still has a long way to go. It is widely used in the crumbling the pellet feed of poultry and aquatic. 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