The technical route of lithium batteries is facing challenges

The technical route of lithium battery is facing challenges. In the recent research on new system battery, the long-life power lithium battery new material and new system research group uses lithium-rich material as the positive electrode and silicon-carbon material as the negative electrode, and its core energy density reaches 348whkg. The research team used lithium-rich materials as the positive electrode and silicon-carbon materials as the negative electrode. The specific energy of the iron core with lithium-rich material as the positive electrode and metal lithium as the negative electrode is 573Wh≤kg. The specific energy of lithium-sulfur batteries is 600W/kg, and the specific energy of primary lithium-air batteries is 780Wh/kg. Lithium cathode is an important general technology for the development of high energy density batteries. Some research groups recommend the use of solids or mixed solids and liquids to solve important technical challenges in batteries that use or contain lithium metal cathodes. Li said that in November 2013, the Chinese Academy of Sciences launched the Chinese Academy of Sciences Strategic Pilot Project A, which also supports the development of solid-state batteries. The three teams have made progress in polymer, sulfide and in-situ solid-state technologies. At present, the weight percentage of the liquid electrolyte in the liquid electrolyte soft core is 15%-25%, which contains negative carbon and negative silicon. In the long run, all solid-state lithium metal batteries have yet to be developed. The cathode contains metallic lithium, and the battery does not contain liquid. Li Hong said. Although the technical route is relatively clear, it is currently facing great challenges. Li Hong said that from the perspective of development, the solid-liquid hybrid electrolyte battery and all-solid-metal lithium battery industry should focus on the development of solid electrolyte and lithium metal materials to solve the problem of interface ion and electron transfer, as well as volume deformation and thermal stability. problem. Most manufacturing equipment can use existing lithium battery and primary lithium metal battery industry equipment. In addition, it has also mastered the processing environment control technology such as the drying room for large-scale processing of lithium metal batteries. Although the development of hybrid solid-liquid electrolyte batteries and all-solid-state lithium metal batteries still faces many technological challenges, including challenges in cost control. As long as we conduct solid and in-depth research on fundamental scientific problems and propose practical, creative, creative, and comprehensive solutions, there is hope to achieve even if there are difficulties. Li Hong said. Disclaimer: Some pictures and content of the articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: What should I do if the performance of the lithium battery for electric vehicles falls out of the warranty period?