Analysis of ternary material technology for 602030 lipo battery

Lithium-ion battery process technology and production application The solubility of the powder with high density is large. During the temperature and pressure increase process of the hydrothermal reaction, the solubility of the former continues to increase. When a certain concentration is reached, the latter will be precipitated. Therefore, the process of hydrothermal powder synthesis is essentially a dissolution/recrystallization process. Li Yunjiao et al. '73 used spherical transition metal hydroxide (250g) and LiOH. H, O (s) (177.8g) as raw materials and put them into a hydrothermal kettle, heated to 250℃ for 4h, cooled and dried at 120℃, and then calcined in two steps. The first step was 500℃ for 6h, and the second step was 900℃ for 10h to obtain the LiNi0.5C00.2Mn0.302 product. From the XRD analysis results, it can be seen that the product obtained after hydrothermal treatment has been lithiated, but the morphology has not been destroyed. (a) Scanning electron micrograph of transition metal hydroxide precursor (b) Scanning electron micrograph of lithiated metal oxide precursor (c) Scanning electron micrograph of LiNi0.5C00.2Mr0302 material (d) Morphology and specific capacity of LULiNi05C002Mt10.30 in different voltage ranges. The spherical (NiMn)CO with concentration gradient was synthesized by urea-assisted hydrothermal method, and then mixed with LiOH and treated at high temperature to obtain the core-shell structured lithium ion battery positive electrode material LiNi0.5Mn1.504. In the experiment, 12.5mmol of NiS04.6H20, 37.5mmol of MnSO4. H20 and 0.1mol of urea were dispersed in 250mL of deionized water, placed in a reactor, and reacted at 180℃ for 12h. The carbonate precursor synthesized by hydrothermal method was converted into oxide after calcination at 500℃ for 3h, and the oxide reacted with LiOH. LiNi0.5Mn1.504 was synthesized by mixing with H20 and calcining at 850℃ for 12h. During the hydrothermal process, a carbonate precursor with a concentration gradient was generated. In a single spherical particle, the content of Ni on the surface was higher than that in the center, while the content of Mn on the surface was lower.

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