Battery grade lithium carbonate has the following main indicators:

Main content

- Lithium carbonate content is generally required to be not less than 99.5%. High purity lithium carbonate can ensure the stability of battery performance, too many impurities will affect the battery charging and discharging efficiency and cycle life.

Impurity content

- Sodium (Na), potassium (K): their contents are usually strictly limited, for example, the sodium content may be required to be no more than 0.02% and potassium content no more than 0.01%. These alkali metal impurities will affect the reliability and performance of the battery and may cause problems such as overheating during use.

- Iron (Fe), copper (Cu), zinc (Zn) and other metal impurities: the content of these impurities is generally required to be at a low level, such as iron content does not exceed 0.001%. Metallic impurities may catalyze undesirable reactions within the battery, reducing battery performance and life.

- Chlorine (Cl-) and sulfate (SO₄²-): their content should also be strictly controlled, e.g., the chlorine content should not exceed 0.005%, and the sulfate content should not exceed 0.05%. These anionic impurities will affect the crystallization process of the battery material, etc., which in turn will affect the battery performance.

Particle size

- The particle size of battery grade lithium carbonate has certain requirements, usually D50 (the particle size corresponding to the cumulative particle size distribution percentage reaches 50%) in a certain range, for example, 4 - 8 μm. appropriate particle size can affect the compaction density of the material, which has an important role in the battery's energy density and other performance, to ensure that there can be a good filler effect in the battery electrode sheet.