The glassy carbon electrode prepared from Nano magnesium oxide has various characteristics. For example, the battery has good stability, high conductivity, high purity, no gas in the electrode, easy surface regeneration, low hydrogen and oxygen overpotential, and low price. The following is a brief introduction for the preparation process of adding nano magnesium oxide to a lithium battery.
First, lithium-ion batteries are selected to add 10-100g/L insoluble solid particles such as TiO2, SiO2, Cr2O3, ZrO2, CeO2, Fe2O3, BaSO, SiC, MgO, etc. with a diameter of 0.05-10μm. The prepared material has the characteristics of good charge and discharge efficiency, high specific capacity, and stable cycle performance as lithium ions.
Second, lithium battery anode material, using nanometer magnesium oxide as a conductive dopant, a magnesium-doped lithium iron manganese phosphate is formed by solid phase reaction, and further a nanostructured positive electrode material is prepared, and the actual discharge capacity reaches 240 mAh/g. The new cathode material has high energy, safety and low cost, and is suitable for liquid and colloidal lithium ion batteries, small and medium-sized polymers, especially 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-magnesia is added as a deacidifying agent to remove acid, and the amount is 0.5-20% by weight of the electrolyte. By removing the acid from the electrolyte, the content of the free acid HF in the electrolyte is reduced to 20 ppm or less, the dissolution of LiMn2O4 by HF is alleviated, and the capacity and cycle performance of LiMn2O4 are improved.
Finally, in the first step, the nano-magnesia is mixed as an alkali solution of a pH adjuster and an aqueous ammonia solution as a complexing agent.
In the second step, lithium hydroxide is added to the Ni-CO composite hydroxide, and the mixture is heat-treated at 280 to 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 coprecipitation.The average particle size of the lithium composite oxide is reduced or the bulk density is increased. When a lithium composite oxide is used as an anode active material, a lithium ion secondary battery having a high capacity can be obtained, and the actual amount of magnesium oxide added is determined according to a specific formulation.