The negative electrode of the lithium titanate battery is a lithium titanate battery material, which is different from the traditional graphite electrode. Its excellent performance is mainly manifested in the following points:
1. Good safety.
The most important point of the electric vehicle battery is that it needs high safety. Lithium titanate batterydoes not form lithium dendrites on the negative electrode due to its high equilibrium potential, but it has good safety, and there are no hidden safety hazards such as explosion and fire.
2. The cycle performance is good,
because it is a "zero strain" material, and there will be no structural changes during charge and discharge, and it has very excellent cycle performance.
3. It can be charged and discharged quickly.
The diffusion coefficient of lithium ions in the lithium titanate crystal is an order of magnitude more than that of the graphite negative electrode. It is fast to charge and discharge, and more importantly, fast charge and discharge have little effect on its life. The ability to charge quickly is an important indicator of the electric vehicle battery in the examination room.
4. Wide operating temperature range -35℃-70℃,
special products can work stably at -50℃, without affecting the market promotion due to environment and region. At low temperatures, the ability to insert and extract lithium will decrease, especially the inserting ability. Lithium titanate anodes will not appear to cause lithium short-circuits or worsen the anode dendrites when charged at -30°C, which is not possible with graphite anodes, Can be quickly charged and discharged in a wide range of environments, suitable for automotive applications.
5. Low self discharge rate
The data we obtained through experiments is that our positive electrode uses our conventional lithium manganate, and the negative electrode uses lithium titanate. The 60-degree storage 28-day capacity residual rate is 88%, and the capacity recovery rate is more than 95%.
6. Long life:
The ordinary lithium battery has a low charge and discharge capacity below zero degrees Celsius and cannot work normally, while the lithium titanate battery has a conversion efficiency of 86% between charge and discharge in the range of minus 35 degrees to 70 degrees above zero. 91% or more, the performance is very superior; the general lithium battery charge and discharge cycle are generally about 5000 times, and the cycle life of lithium titanate battery can reach more than 20,000 times.
