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release time:2024-06-05 Hits: Popular:AG11 battery
Breakthrough in specific energy of 1.2V Ni-MH battery cell monomers, electric vehicle mileage will double
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 of "New Energy Vehicles" of the National Key R&D Program, the project team of Tianjin Lishen 1.2V Ni-MH 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 a variety of technologies such as nano-preparation, nano-dispersion, coating and pre-embedded lithium.
Based on the high nickel cathode material and silicon carbon anode material system, the specific energy of the 1.2V Ni-MH battery cell reached 302Wh/Kg, which is a breakthrough.
The volume energy density of this 1.2V Ni-MH battery cell is greater than 642Wh/L, and the capacity retention rate reaches 80% after 710 cycles of 1C charge and discharge at 25°C (100% DOD). 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 lays the foundation for the development of lithium-ion 1.2V Ni-MH battery cells with a specific energy of 300Wh/kg and a cycle life of 1500 times.
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