The glassy carbon electrode made of nano-magnesium oxide has many characteristics, such as good stability to the battery, high conductivity, high purity, no gas in the electrode, easy surface regeneration, small hydrogen oxygen overpotential, low price. . However, these are more general statements, so what is the specific role of magnesium oxide in lithium batteries?

First of all, lithium-ion batteries choose to add 10-100g/L of TiO2, SiO2, Cr2O3, ZrO2, CeO2, Fe2O3, BaSO, SiC, MgO other insoluble solid particles with a diameter between 0.05-10μm; use the made material as lithium ions It has the characteristics of good charge discharge efficiency, high specific capacity stable cycle performance.

Secondly, the positive electrode material of the lithium battery uses nano-magnesium oxide as a conductive dopant to generate magnesium-doped lithium iron manganese phosphate through solid-phase reaction, further makes a nano-structured positive electrode material whose actual discharge capacity reaches 240 mAh/g. This new cathode material has the characteristics of high energy, safety, low price. It is suitable for liquid colloidal lithium-ion batteries, small medium-sized polymers, especially for high-power power batteries.

Then, the capacity cycle performance of the spinel lithium manganate battery are optimized. In the electrolyte of a lithium ion battery using spinel lithium manganate as a positive electrode material, nano-magnesium oxide is added as a deacidification agent to remove acid, the amount added is 0.5-20% of the weight of the electrolyte. By deacidifying the electrolyte, the content of free acid HF in the electrolyte is reduced to below 20 ppm, reducing the dissolution of HF to LiMn2O4, improving the capacity cycle performance of LiMn2O4.

Finally, in the first step, the alkaline solution of nano-magnesium oxide as a pH adjuster an aqueous ammonia solution as a complexing agent are mixed added to the mixed aqueous solution containing cobalt nickel salts to co-precipitate Ni-CO composite hydroxide Thing.

In the second step, lithium hydroxide is added to the Ni-CO composite hydroxide, the mixture is heat-treated at 280-420°C.

In the third step, the product produced in the second step is heat-treated in an environment of 650-750°C, which is related to the time of co-precipitation. The average particle size of the lithium composite oxide decreases the bulk density increases accordingly. When the lithium composite oxide is used as the anode active material, a high-capacity lithium ion secondary battery can be obtained, the actual addition amount of magnesium oxide depends on the specific formula.