Brief analysis of the advantages and disadvantages of ternary lithium batteries

Advantages and disadvantages of ternary lithium batteries Ternary batteries, ternary polymer batteries or ternary polymer lithium batteries, etc. refer to ternary lithium batteries. What is a ternary lithium battery? The first is lini1/3co1/3mn1/302, which is A ternary material used to make ternary lithium batteries. (1) Advantages of ternary lithium battery: Compared with ordinary lithium drill, ternary lithium battery has higher energy density and better cycle performance. At present, with the continuous improvement of the formula and the improvement of the structure, the nominal voltage of the battery has reached 3.7V, and the capacity has reached or exceeded the level of lithium borate batteries. The electrochemical performance and thermal stability of lini1/3co1/3mn1/3O2, the anode material of the lithium battery, Lini1/3co1/3mn1/3o2 has a high lithium ion diffusion capacity, and the theoretical capacity is 278mAh/g. During the charging process, there are two platforms between 3.6v and 4.6v, one is about 3.8v and the other is about 4.5v. The important reason is that the two power pairs, Ni2+/Ni4+ and Co3+/Co4+, are as high as 250mAh/s. The capacity is 91% of the theoretical capacity. In the voltage range of 2.3v~4.6v, the discharge specific capacity is 190mAh/g, and the reversible specific capacity is greater than 190mAh/g after 100 cycles. At 2.8v~4.3v, the electrical performance test is carried out in the potential range of 2.8v~4.4v and 2.8v~4.5v. The discharge specific capacity is 159 at different charge and discharge temperatures (55℃, 75℃, 95℃). ) And different rates, the material structure changes little, has good stability, high temperature performance is good, but low temperature performance needs to be improved. The safety of lithium batteries has always been an important means of commercialization of lithium batteries. The thermal effect of the electrolyte in the charged state is the key to determining whether the cathode material is suitable for lithium batteries. DSC test results show that after charging, there is no peak at lini1gco1gmn1/3o2 at 250~350℃, LiCoO2 has two exothermic peaks at 160℃ and 210℃, and LiNiO2 has an exothermic peak at 210℃. Ternary materials also have certain exothermic and endothermic reactions in this temperature range, but the reaction is relatively mild. (2) Disadvantages of ternary lithium battery: ternary material power lithium battery mainly includes nickel diamond lithium aluminate battery, nickel diamond lithium manganese acid battery and so on. The high temperature structure is unstable, the safety at high temperature is poor, and the pH value is high, which is easy to cause the monomer gas to malfunction. Under current conditions, the cost is not low. Disclaimer: Some pictures and content of articles published on this site are from the Internet, please contact to delete if there is any infringement. Previous: Low-temperature lithium battery internal heating