What kind of battery is a ternary lithium battery

What is a ternary lithium battery? A ternary battery, a ternary polymer battery or a ternary polymer lithium battery, etc. refers to a ternary lithium battery. What is a ternary lithium battery? First, it is lini1/3co1/3mn1/3O2, one kind Ternary materials used in the manufacture of ternary lithium batteries. The structural characteristics of the ternary material lini1/3co1/3mn1/3o2 for polymer lithium batteries: The anode material of Lini1/3co1/3mn1/3o2 is a single a-nafeo2 layered rock salt structure, and the structure is a hexagonal system similar to LiCoO2. The space point group is R3m. Lithium ions occupy position 3a (111) in the rock salt structure, transition metal ions occupy position 3b, and oxygen ions occupy position 6c. There are 6 oxygen atoms around each transition metal atom to form a MO6 octahedral structure, and lithium ions are embedded in the ni1/3co1/3mn1/3o layer formed by the transition metal atoms and oxygen atoms. Because the radius of divalent nickel (0.069nm) and the radius of lithium (0.076nm) are similar, a small amount of nickel ions may occupy the 3a position, resulting in mixed occupation of cations and poor electrochemical performance of the material. Generally in XRD, the intensity ratio of (003)/(104) peak, the cleavage degree of (006)/(012) peak and (018)/(110) peak are indicators of the occupancy of cation mixture. Generally speaking, the intensity ratio of the (003)/(104) peak is higher than 1.2 and (006)/when the (012) and (018)/(110) peaks are clearly split, the layered structure is obvious, and the electrochemical performance of the material good. Battery parameters au003d2.8622a, cu003d14.2278a. Nickel, cobalt, and manganese exist in the crystal lattice with valences +2, +3, and +4, respectively, and there are also a small amount of Ni3+ and Mn3+. In the charge and discharge process, in addition to Co3+/4+ electron transfer, there are Ni2+/3+ and Ni3+ electron transfer, which also makes the material have a higher specific capacity. Mn4+ is only used as a structural material and does not participate in redox reactions. Koyama et al. proposed two crystal structure models describing LiNi1sCou3Mnm3O2, namely the complex model of the R30 upper structure [Ninaco1sMn1] layer, with the unit parameter au003d4.904acu003d13.884a. The lattice formation energy is -0.17ev, CoO2, NiO2 and MnO2 layers. Orderly accumulation, the simple model of lattice formation energy +0.06ev. Therefore, under appropriate synthesis conditions, the first model can be formed to minimize the volume change of the crystal lattice during charge and discharge, reduce energy, and help maintain the stability of the crystal lattice. 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 for the 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. The 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. 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: Lithium-ion power lithium-ion battery planning