The glassy carbon electrode made of nano-magnesium oxide has many characteristics, such as good battery stability, high conductivity, high purity, no gas in the electrode, easy surface regeneration, low hydrogen and oxygen overpotential, low price, etc. . The following is a brief introduction to the preparation process of adding nano-magnesium oxide to lithium batteries.
First, the lithium ion battery chooses to add 10-100g/L TiO2, SiO2, Cr2O3, ZrO2, CeO2, Fe2O3, BaSO, SiC, MgO and other insoluble solid particles with a diameter of 0.05-10μm; use the finished material as lithium ion It has the characteristics of good charge and discharge efficiency, high specific capacity and stable cycle performance.
Secondly, the lithium battery cathode material uses nano-magnesium oxide as a conductive dopant to generate magnesium-doped lithium iron manganese phosphate through a solid-phase reaction, and further make a nano-structured cathode material, with an actual discharge capacity of 240 mAh/g. This new type of cathode material has the characteristics of high energy, safety and low price, and is suitable for liquid and colloidal lithium ion batteries, small and medium-sized polymers, and especially suitable for high-power power batteries.
Then, optimize the capacity and cycle performance of the spinel lithium manganate battery. In a lithium ion battery electrolyte using spinel lithium manganate as a positive electrode material, nano-magnesium oxide is added as a deacidification agent to remove acid, and the addition amount is 0.5-20% of the weight of the electrolyte. By removing acid from the electrolyte, the content of free acid HF in the electrolyte is reduced to less than 20 ppm, the dissolution effect of HF on LiMn2O4 is reduced, and the capacity and cycle performance of LiMn2O4 are improved.
Finally, in the first step, the alkaline solution of nano-magnesium oxide as a pH regulator is mixed with an aqueous ammonia solution as a complexing agent, and added to the mixed aqueous solution containing cobalt salt and nickel salt to co-precipitate Ni-CO composite hydroxide Things.
In the second step, lithium hydroxide is added to the Ni-CO composite hydroxide, and 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 or 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, and the actual amount of magnesium oxide added depends on the specific formula.