Electrochemical performance and thermal stability of ternary materials for lithium batteries

Ternary batteries, ternary polymer batteries or ternary polymer lithium batteries refer to ternary lithium batteries. What is a ternary lithium battery? Let’s talk about the ternary materials used to make ternary lithium batteries. LiNi1/3Co1/3Mn1/3O2 now. The structural characteristics of the ternary material LiNi1/3Co1/3Mn1/3O2: the electrochemical performance and thermal stability of the ternary material of the lithium battery LiNi1/3Co1/3Mn1/3O2 as the cathode material of the lithium ion battery has a high lithium ion diffusion capacity , The theoretical capacity is 278mAh/g. During the charging process, there are two platforms between 3.6V and 4.6V, one is around 3.8V and the other is around 4.5V, mainly due to Ni2+/Ni4+ and Co3+/Co4+ 2 electric pairs, and the capacity can reach 250mAh/s, which is 91% of the theoretical capacity. In the voltage range of 2.3V~4.6V, the discharge specific capacity is 190mAh/g, and after 100 cycles, the reversible specific capacity is more than 190mAh/g. The electrical performance test was carried out in the potential range of 2.8V～4.3V, 2.8V～4.4V and 2.8V～4.5V. The discharge specific capacity was 159mAh/g, 168 mAh/g and 177 mAh/g respectively and under different temperatures ( When charging and discharging at 55°C, 75°C, 95°C) and different rates of discharge, the structure of the material changes little, has good stability, and good high-temperature performance, but low-temperature performance needs to be improved. The safety of lithium-ion batteries has always been an important measure of commercialization, and the thermal effect of the electrolyte with the charging state is the key to whether the cathode material is suitable for lithium-ion batteries. DSC test results show that the charged LiNi1gCo1gMn1/3O2 has no peak at 250~350℃, LiCoO2 has two exothermic peaks at 160℃ and 210℃, and LiNiO2 has an exothermic peak at 210℃. Ternary materials also have some exothermic and endothermic reactions in this temperature range, but the reaction is much milder. Disclaimer: Some pictures and content of the articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: Calculate the life of the lithium battery according to the time or the number of cycles