Lithium titanate battery and its characteristics analysis

Lithium titanate battery is a kind of lithium titanate used as a negative electrode material for lithium batteries. It can be combined with lithium manganate, ternary materials or lithium iron phosphate to form a 2.4V or 1.9V lithium ion secondary battery. In addition, it can also be used as a positive electrode to form a 1.5V lithium secondary battery with metallic lithium or lithium alloy negative electrode. Because of the high safety, high stability, longevity and environmental protection characteristics of lithium titanate. Lithium titanate materials are widely used in new energy vehicles, electric motorcycles and applications requiring high safety, high stability and long-term cycles as negative materials for new generation lithium batteries. Lithium titanate battery packs into positive electrode: lithium iron phosphate, lithium manganate or ternary materials, lithium nickel manganate. Negative electrode: lithium titanate material. Barrier: Lithium battery barrier with carbon as negative electrode. Electrolyte: Lithium battery electrolyte with carbon as the negative electrode. Battery case: Lithium battery case with carbon as negative electrode. Lithium titanate battery characteristics Lithium titanate (LTO) material is used as a negative electrode material in a battery. Because of its own characteristics, the material and the electrolyte are prone to mutual use and gas separation occurs during the charge and discharge cycle reaction. Therefore, the general lithium titanate battery is prone to flatulence, causing the battery core to bulge, and the electrical function will also be greatly reduced, which greatly reduces the theoretical cycle life of the lithium titanate battery. The detection data indicate that the general lithium titanate battery will develop flatulence after about 1500-2000 cycles, resulting in failure to operate normally, which is also an important reason for restricting the large-scale use of lithium titanate batteries. The improvement of lithium titanate (LTO) battery function is a summary manifestation of the improvement of the function of a single data and the organic integration of various key data. In response to the requirements of fast charging and long service life, in addition to the negative electrode material, other key materials of the lithium battery (including the positive electrode material, barrier, and electrolyte), combined with the special engineering process experience, finally formed Flatulence lithium titanate LpTO battery products, and first completed the batch use in electric buses. The detection data shows that under the conditions of 6C charge, 6C discharge, and 100% DOD, the cycle life of the lithium titanate LpTO single battery exceeds 25,000 times, and the remaining capacity exceeds 80%. The flatulence phenomenon of the battery cell is unclear. It does not affect its lifespan; and the actual use of Chongqing fast-charging pure electric buses also indicates that after the batteries are assembled, the electrical functions are also quite excellent, which can ensure the daily commercial operation of pure electric buses. Advantages of lithium titanate batteries 1. Good safety: The most important point of electric vehicle batteries is the need for high safety. Because of its high equilibrium potential, lithium titanate does not form lithium dendrites on the negative electrode, and has good safety. 2. Good circulation function: Because it is a zero-strain material, it will not undergo structural changes during charging and discharging, and has a very superior circulation function. 3. Capable of rapid charge and discharge: The diffusion coefficient of lithium ions in lithium titanate crystals is 2u0026TImes;10-8cm-2/s, which is an order of magnitude more than that of graphite negative electrodes. It can charge and discharge quickly. The rapid charging ability is for investigating electric vehicle batteries. An important indicator. 4. The working temperature range is -30℃~60℃: the insertion and extraction capacity of lithium will decrease at low temperature, especially the insertion capacity. The lithium titanate anode will not cause short circuit or deteriorate the negative electrode when charged at -30℃. Lithium dendrites are present, which is not possible with graphite anodes. It can be quickly charged and discharged in a wide range of environments, and is suitable for automotive applications. 5. Low self-discharge: The positive electrode uses conventional lithium manganate and the negative electrode uses lithium titanate. The capacity remaining rate of 28 days at 60 degrees is 88%, and the capacity recovery rate is more than 95%. 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: How to improve the charging speed of lithium batteries