Detailed explanation of lithium battery electrolyte technology and development trends

After years of development, domestic lithium battery electrolyte has become the most technologically mature variety of the four major materials. It has been exported in large quantities, accounting for more than 50% of the global share. Recognition by major international factories proves the quality of domestic electrolyte. With the start of the demand for electric vehicles, it will not be too difficult for leading electrolyte companies with strong Ru0026D capabilities to enter this category. In addition, the popularization of electric vehicles still requires the price reduction of power lithium-ion batteries, so there is huge room for domestic electrolyte replacement. The manufacturing and Ru0026D level of leading electrolyte companies in my country has rapidly improved in recent years, and the product quality has quickly approached the international advanced level. Relying on the advantages of cost performance, my country's lithium battery electrolyte global market share has increased rapidly in recent years, and the products of Jiangsu Cathay Pacific, Xinzhoubang and Tianjin Jinniu have entered the international market. According to what we know, the issue of electrolyte formulation patents is also an important reason that bothers Chinese companies to go global. At present, some of the electrolyte formulation patents are in the hands of Japanese manufacturers such as Mitsubishi and Ube, which has become a key obstacle preventing my country's electrolyte from entering the Japanese market. At present, Jiangsu Cathay Pacific and Xinzhoubang have increased the research and development of formulas. If they can break through the patent blockade in Japan and open up the Japanese market, the market space will increase significantly. Considering that the current global power lithium batteries are urgently processed in Japan, the significance of breaking the patent blockade will be even more significant. The development trend of lithium battery electrolyte technology 1. The pursuit of high specific energy electrolyte is the biggest research direction of lithium batteries, especially when mobile devices occupy more and more proportions in people’s lives, battery life becomes The most critical performance of the battery. 2. High-power electrolyte. At present, it is difficult for commercial lithium batteries to continue to discharge at a high rate. The main reason is that the battery tabs generate severe heat, and the internal resistance causes the overall temperature of the battery to be too high, which is prone to thermal runaway. Therefore, the electrolyte should be able to prevent the battery from heating up too quickly while maintaining high conductivity. Regarding power lithium-ion batteries, fast charging is also an important direction for electrolyte development. 3. Wide-temperature electrolyte batteries are prone to electrolyte self-analysis and intensified side reactions between materials and electrolyte parts at high temperatures; at low temperatures, electrolyte salt precipitation and negative SEI film impedance may increase exponentially. The so-called wide temperature electrolyte is to make the battery have a wider working environment. 4. Safety The safety of electrolyte batteries is currently burning or even exploding. First of all, the battery itself is flammable. Therefore, when the battery is overcharged, over-discharged, short-circuited, When the outside temperature is too high, it may cause safety accidents. Therefore, flame-retardant is an important direction in the research of safe electrolyte. 5. Long-cycle electrolytes. Due to the large technical difficulties in the recycling of lithium batteries, especially power lithium-ion batteries, increasing the battery life is a way to alleviate this situation. There are two important points in the research thinking of long-cycle electrolyte. One is the stability of the electrolyte, including thermal stability, chemical stability, and voltage stability; the other is the stability with other materials, which requires stable film formation with the electrode. There is no oxidation with the diaphragm and no corrosion with the current collector. 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 post: Why does the battery require more temperature for charging than discharging?