Electronic grade magnesium carbonate (MgCO3) is widely used in the synthesis of positive electrode materials such as lithium iron phosphate (LFP), high nickel ternary (NCM811/NCA), lithium rich manganese based, and lithium manganese oxide due to its high purity, low impurity content, good pyrolysis behavior, and structural control ability. The high-purity electronic grade magnesium carbonate product launched by China Magnesium Industry is designed specifically for the new energy industry and is suitable for multiple core processes such as material sintering, structural coating, electrical performance control, and metal doping. It is an ideal magnesium source solution for building high-performance lithium battery cathode materials. With the rapid development of new energy vehicles, energy storage systems, and high rate batteries, battery materials are gradually evolving towards higher specific energy, higher stability, and greater safety. As an important additive component in the precursor of positive electrode materials

✅  Technical Advantage 1: High purity and low impurities, ensuring stable electrochemical performance of the battery

1. Ultra high purity (≥ 99.5~99.9%), meeting the requirements for lithium grade magnesium sources;

2. Strict impurity control: The content of impurities such as Fe, Cl, Ca, Na, Al, Si, etc. is less than 50ppm, effectively avoiding side reactions and lithium deposition caused by metal ion impurities;

3. Meet the cleanliness requirements of high-purity inorganic precursors in the electronic materials and new energy industries, and adapt to the reaction pathways of phosphate based and oxide positive electrode materials.

✅  Technical Advantage 2: Good thermal decomposition characteristics, suitable for positive electrode sintering process

Electronic grade magnesium carbonate decomposes stably between 650~750 ℃ to generate highly active magnesium oxide (MgO), which is suitable for high-temperature solid-state synthesis of positive electrode materials and plays the following roles:

·Regulating crystal structure and particle size distribution to suppress abnormal grain growth at high temperatures;

·Stabilize the surface and grain boundaries of materials, enhance cycling stability and structural integrity;

·Mg ² ⁺ as a doping ion entering the positive electrode lattice can improve the ion diffusion rate and material rate performance.

Specially suitable for use as a structural stabilizer and doping modifier in high-energy density material systems such as ternary materials (such as NCM811), lithium rich cathodes (Li rich NMC), and high-voltage lithium manganese oxide (LiMn1.5Ni0.5O4).

✅  Technical Advantage Three: Coating/Composite Function, Improving Material Interface Safety

Electronic grade magnesium carbonate can also be used as an inorganic layer precursor for positive electrode surface coating, which is converted into MgO ceramic coating through heat treatment and has the following functions:

·Inhibit electrolyte side reactions, reduce the formation of interface by-products and impedance growth;

·Improve the high-temperature cycling stability and storage safety of materials;

·It can be co coated with Li ∝ PO ₄, Al ₂ O ∝, ZrO ₂, etc. to form a composite protective coating.