The development direction of mainstream electrolytes for lithium batteries

Although the development direction of the mainstream electrolyte of lithium-ion batteries has not yet gone, all the difficulties are not high, the quality stability is poor, and the production cost is too high. One of the four pillars of the lithium-ion battery of the electrolyte, especially the key is the lithium method ( LiPF6) data show that the trend is eager to improve. At the recent seminar held in Suzhou in my country, overwhelmed experts collaborated in the production of lithium-ion battery electrolytes, striving for product function, safety, and production capital. The high-end lithium hexafluorophosphate materials developed and produced instead of imported materials can meet the needs of large capacity and volume. The market demand for small, tablet computers, and mobile phone batteries has opened up for my country's lithium-ion battery material industry to embark on a healthy path. Currently, the mainstream electrolyte lithium salt for lithium-ion batteries is still lithium hexafluorophosphate. Compared with other electrolyte lithium salts, lithium hexafluorophosphate has good ionic conductivity and electrochemical stability, waste batteries are easy to recycle, and have good environmental protection functions. Therefore, in recent years, companies such as Cathay Pacific Huarong, Xinzhou City, Guangzhou Tianchi and other companies have built new and expanded projects to increase the capacity of electrolyte production. Japan's Ube and Dow Chemical established an electrolyte joint venture in my country, and Mitsubishi Chemical also established a wholly-owned subsidiary to build a new electrolyte project. As the industrial synthesis technology of lithium hexafluorophosphate has been broken, domestic companies such as Polyfluorinated Chemicals and Cathay Huarong have gradually begun to industrialize from pilot trials to batches. After the launch of a large number of projects, my country's import ratio of lithium hexafluorophosphate has dropped from over 80% of the total imports in previous years to 62%, and the level of localization has been greatly improved. However, most domestic lithium hexafluorophosphates are facing challenges in terms of quality stability and production costs due to the high level of free acid bottlenecks. This product is not like high-end lithium-ion batteries such as mobile phones and tablet computers. In terms of industrialization of lithium hexafluorophosphate, my country still lags behind developed countries such as Japan. Zhao Yongfeng, deputy general manager of the chemical company, said that it is necessary to participate in international competition to create its own core competitiveness, which depends to a large extent on technological innovation and market development, rather than pure capital investment. Representatives at the meeting generally believed that domestic companies should seize the opportunity to quickly turn on and use lithium-ion batteries, such as smartphones, tablets, and mobile power supplies, and pay attention to potential replacement of lithium-ion batteries in the opening of large-scale electric vehicles and energy storage malls. In the fields of electric bicycles and low-speed electric vehicles. At present, there are big differences in quality between domestic lithium and Japanese and Korean lithium, such as the control of HF content and the circulation function of the core material after forming. Experts pointed out that the production process of lithium hexafluorophosphate is more complicated, and the most difficult thing to grasp in mass production is the uniformity of product purity. There are many factors that affect product quality, including material quality, equipment accuracy, process control, etc. These should be the direction for domestic companies to break through technology. Some experts also believe that the electrolyte is a complex system composed of organic solvents, lithium salts and additives. How to find the best lithium salt electrolyte formulation still requires bold experimentation. Although the new electrolyte lithium salt will not replace the lithium method on a large scale in the near future, the new international trend is to develop the functional requirements of various lithium salt electrolytes, and the company can be the key to research and development in this area. Wang Xinlong, associate professor of chemical engineering at Sichuan University, said that they have developed a new production process for lithium hexafluorophosphate and hope to find partners to carry out pilot tests. This fire partner is not only capital, but more importantly, it must have low-cost products and relevant experience in production management, and make breakthroughs through collaborative innovation. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous article: Three ways to improve the performance of lithium battery cathode materials