With the increasing trend of high-energy power and energy storage batteries, improving the thermal stability, safety, and interface structure integrity of materials has become an important research and application direction for the positive electrode system of lithium iron phosphate (LFP) and ternary materials (NCM/NCA). The battery specific high-purity magnesium oxide (MgO ≥ 99.5%) launched by Zhongmei Magnesium Industry is widely used in functional processes such as LFP material coating, NCM/811 coating modification, battery separator ceramic coating additives, electrolyte by-product adsorbents, etc. It is a key inorganic functional material for building a new generation of safe and efficient lithium battery systems.

The high-temperature cycling stability and rate performance are still limited by the conductive network and interface structure. High purity magnesium oxide can significantly enhance the structural stability and interface protection performance of the material by forming a Mg-O-P synergistic interface layer on the surface of lithium iron phosphate particles.

Technical advantages:

·MgO forms a stable phosphate structure at the interface with LiFePO ₄ at high temperatures, inhibiting the dissolution of Fe ² ⁺ and electrolyte corrosion;

·Improve the density of particle sintering and enhance the integrity of the material's conductive path;

·By incorporating carbon coating pre-treatment or blending, the rate performance and cycle life can be further enhanced.

At high temperatures, it is easy to react with electrolyte by-products to produce gases, which affect cycling stability. High purity magnesium oxide, as an inorganic coating additive, can co composite with Al ₂ O ∝, Li ∝ PO ₄, etc. to form a dense barrier layer.

Core functions:

·Block HF erosion, enhance residual capacity and interface impedance control capability in circulation;

·Control the reduction of Ni ³ ⁺ to Ni ² ⁺ to reduce crystal defects;

·Improve the high-temperature storage stability of polarizer and adapt to water-based/oil-based slurry systems.

High purity magnesium oxide can also be used in lithium battery separators (PE, PP) ceramic coating systems as an auxiliary filler to enhance the thermal stability, electrical insulation performance, and anti shrinkage ability of the separator.

Zhongmagnesium Magnesium Industry has been focusing on the research and development of high-purity magnesium based powder materials and large-scale supply for more than ten years. Its products are widely used to serve lithium iron phosphate, ternary materials, electrolyte systems, battery separator enterprises and research institutions, providing:

·Export type magnesium oxide series;

·Support sample testing, formula assistance, and parameter docking;

·Support for combined use with coating systems such as Al ₂ O ∝, BN, SiO ₂, etc.