T/GZHG 006-2019 Large-scale lithium nickel cobalt manganese oxide (NCM523) battery

Scope

Main Technical Content: 4 Requirements 4.1 Appearance The product's appearance should be a blue-black powder with uniform color and no agglomeration. 4.2 Chemical Composition 4.2.1 The product's chemical composition should comply with the requirements specified in Table 1. Table 1: Chemical Component Content (Mass Fraction) % **Main Content** Li: 6.5–8.5% Co: 10.0–14.0% Ni: 28.5–32.5% Mn: 14.8–18.8% Ni + Co + Mn: 58.8 ± 1.5% **Impurities** Na ≤ 0.020% Mg ≤ 0.030% Ca ≤ 0.010% Fe ≤ 0.005% Zn ≤ 0.002% Cu ≤ 0.002% Si ≤ 0.030% SO42- ≤ 0.450% Cl- ≤ 0.050% 4.2.2 The molar ratio of Li to (Co + Ni + Mn) in the product's chemical composition should be between 1.00 and 1.10. 4.2.3 The product's moisture content should not exceed 0.05% (mass fraction). 4.3 Crystal Structure The diffraction peak shape of the product's crystal structure should comply with the JCPDS standard (standard PDF card number: 52-0457). 4.4 Physical Performance 4.4.1 Tap Density The product's tap density should be greater than or equal to 1.8 g/cm3. 4.4.2 Particle Size Distribution The product's particle size distribution should follow a normal distribution, with the characteristic values meeting the following requirements: - DV10 should be greater than 2.0 μm; - Dv50 within the range of 3.5–6.5 μm; - DV90 should be less than 15.0 μm. 4.4.3 BET Surface Area The product's BET surface area should be within the range of 0.25–0.8 m2/g. 4.5 pH Value The product's pH value should be within the range of 10.0–12.0. 4.6 Electrochemical Performance 4.6.1 First Discharge Specific Capacity The product's first discharge specific capacity under specified conditions (discharge voltage: 4.35V–2.8V, 0.1C) should not be less than 170 mA·h/g. 4.6.2 First Charge-Discharge Efficiency The product's first charge-discharge efficiency under specified conditions should not be less than 86%. 4.6.3 Cycle Life When the discharge capacity reaches

Development Information

Related Standards