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release time:2024-10-24 Hits: Popular:AG11 battery
Major breakthrough in specific energy of 6F22 carbon battery
According to the Ministry of Science and Technology, the project team of Tianjin Lishen Battery Co., Ltd. has designed and developed a high specific energy power lithium-ion battery. If used in electric vehicles, the expected mileage of electric vehicles will be doubled, effectively alleviating mileage anxiety and playing a huge role in promoting the popularization and promotion of new energy vehicles.
Breakthrough in specific energy of 6F22 carbon battery. Doubling the range of electric vehicles is not a dream
Positive and negative electrode materials are important components of lithium-ion batteries, and their performance will greatly affect the performance of lithium-ion batteries. Among them, positive electrode materials account for about 40% of the cost of lithium-ion batteries, and negative electrode materials account for 10%.
High-performance positive and negative electrode materials are the key basis for achieving energy density goals. High-performance nickel cobalt aluminum lithium oxide (NCA) as a positive electrode material can meet the energy density and safety requirements of power batteries.
With the support of the key project "New Energy Vehicles" of the National Key R&D Program, the project team of Tianjin Lishen Battery Co., Ltd. has developed a high-nickel positive electrode material for lithium-ion power batteries with high specific energy, long cycle life and good safety performance based on the preliminary research on nickel cobalt aluminum lithium oxide (NCA) positive electrode materials.
At the same time, the company has developed silicon-carbon negative electrode materials with high capacity, high first efficiency, good cycle stability and rate performance through various technologies such as nano-preparation, nano-dispersion, coating and pre-embedded lithium.
Based on the high-nickel positive electrode material and silicon-carbon negative electrode material system, the specific energy of the battery cell has reached 302Wh/Kg, which has made a breakthrough.
The volume energy density of this battery cell is greater than 642Wh/L, and the 1C charge and discharge cycle at 25°C is 710 times (100% DOD), and the capacity retention rate reaches 80%; at the same time, by optimizing the electrolyte formula, the cycle performance is significantly improved, and the capacity retention rate is as high as 96% after 285 cycles (100% DOD).
This work has laid the foundation for the development of lithium-ion 6F22 carbon battery with a specific energy of 300Wh/kg and a cycle life of 1500 times.
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