Detailed explanation of lithium battery composite cathode material technology

An important part of lithium electronic battery materials Composite cathode material technology In recent years, people have conducted research on the data that LiII/2mn1/2o2 contains a large amount of manganese. It has many advantages over iodine. If the capacity is large, the structure is stable, the thermal stability is good, and the circulation function is good. The disadvantage is that Li2MnO3 is processed by the traditional solid-state synthesis method, and the reactive NiO impurity is insufficient. Second, due to the medium current density and low electronic conductivity, the data capacity drops sharply. Further research shows that the doping of cobalt not only reduces the difficulty of synthesis, but also improves the conductivity and thermal stability of electrons. Therefore, ternary data with common interest, especially lini1/3co1/3mn1/3O2 data, has become the focus of attention of scientists. It combines the interests of Lisso 2, Linio 2, and Limo 2. When the charging voltage is 4.2v and 4.6v, the discharge capacity can reach 150mAh/g and 200mAh/g, respectively, which has become the hot battery data in recent years. Positive response equation: lini1/3co1/3mn1/3O2 charge and discharge Li(1-x)ni1/3co1/3mn1/3O2+XLi+XLi++xe-1lini1/3co1/3mn1/3O2 data structure in the lithium ion structure, lithium Ions occupy 3A positions on the (1,1,1) crystal plane, nickel, cobalt, and manganese randomly occupy 3b positions, and oxygen ions occupy 6C positions. The transition metal layer is composed of nickel, cobalt, and manganese. Each transition metal atom is surrounded by six oxygen atoms to form an octahedral structure. Some LI+ and lii1/3co1/3mn1/3o2 transition metal ions are mixed with cations. Since the radius of Ni2+ (0.069nm) is the closest to the radius of Li+ (0.072nm), the degree of mixing is particularly significant. XPS results show that the spreads of Ni, Co, and Mn are +2, +3, and +4, respectively. At the same time, Ni2+ and Co3+ exist as active materials, and Mn4+ is used as a framework in material speculation (6). This structure determines the final electrical function of the data. During the charging and discharging process, the oxidation recovery potential channel of Ni is about 3.75v, and Co3+ can be oxidized to Co4+ only when the charging voltage reaches 4.6v[7]. 6v is compensated by CO3+ oxidation. The structure of lii1/3co1/3mn1/3o2 is usually characterized by X-ray diffractometer (XRD). 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: Can solid-state batteries replace lithium batteries?