Advantages and disadvantages of ternary lithium-ion batteries

Ternary lithium ion battery Ternary polymer lithium ion battery: The positive electrode material is a lithium ion battery and a ternary positive electrode material (Li(NiCoMn)O2). Specifically, the positive electrode is a ternary battery and the negative electrode is a graphite ternary power lithium battery. The other positive electrode is ternary, and the negative electrode is lithium titanate, usually called lithium titanate, rather than ordinary ternary materials. 1. The advantages of ternary lithium-ion batteries: ternary lithium-ion batteries have higher energy density and better cycle performance than ordinary lithium drills. 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 Lini1/3co1/3mn1/3o2 anode material is a single a-nafeo2 layered rock salt structure, which is a hexagonal system similar to LiCoO2, and the spatial 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) when the (012) and (018)/(110) peaks are clearly split, the layered structure is obvious, and the electrochemical performance of the material is 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 also 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 the charge and discharge process, 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-ion 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, 2. Disadvantages of ternary lithium-ion batteries: ternary material power lithium-ion batteries mainly include nickel diamond lithium aluminate batteries, nickel diamond lithium manganese acid batteries and so on. The high temperature structure is unstable, the safety at high temperature is poor, and the pH value is high, which easily causes 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. If there is any infringement, please contact to delete. Previous: What are the advantages of lithium iron phosphate batteries compared with other batteries?