Meishen Technology Company
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.