role of nano MgO in lithium battery
Lithium ion battery can be recharged during use
It belongs to a secondary rechargeable battery
The main working principle is the repeated movement of lithium ions between positive and negative electrodes
Regardless of the shape of the battery, its main components are electrolyte, positive plate, negative plate and diaphragm
At present, the main producers of lithium-ion batteries in the world are concentrated in China, Japan and South Korea
The main lithium-ion application markets are mobile phones, computers and trams
With the continuous development of lithium-ion battery, the application field is also gradually expanding
Its use of cathode materials has changed from simplification to diversification, including olivine lithium ferrous phosphate, layered lithium cobalt oxide, spinel lithium manganate and so on
Nano magnesium oxide (vk-mg30d) is a new type of nano particle material
It has white powder appearance, high purity and large specific surface area
It is composed of fine grains
It has obvious small size effect, surface effect, quantum size effect and macro tunnel effect
There is no gas in the electrode, the surface regeneration is easy, the overpotential of hydrogen and oxygen is small, and the price is cheap, Therefore, it is widely used
Brief introduction of nano magnesium oxide (vk-mg30d) added to lithium battery:
1
10-100g / L of lithium-ion battery with a diameter of 0
05-10 & mu; M, such as TiO2, SiO2, Cr2O3, ZrO2, CeO2, Fe2O3, BaSO, SiC, MgO and other insoluble solid particles
The material as lithium ion has the characteristics of good charge discharge efficiency, high specific capacity and stable cycle performance
2
As the cathode material of lithium battery, nano magnesium oxide (vk-mg30d) is used as the conductive dopant to generate magnesium doped lithium iron manganese phosphate through solid-state reaction, and further make the nanostructured cathode material
Its conductivity can reach 10-2s / cm and the actual discharge capacity can reach 240mAH / g
The new cathode material has the characteristics of high energy, environmental protection and low price
It is suitable for liquid and colloidal lithium-ion batteries and small and medium-sized polymers, especially for high-power power batteries
3
Optimize the capacity and cycle performance of spinel lithium manganate battery
In the electrolyte of lithium ion battery with spinel lithium manganate as cathode material, nano magnesium oxide (vk-mg30d) is added as deacidification agent to remove acid, and the addition amount is 0
5-20% of the weight of electrolyte
By removing the acid from the electrolyte, the content of free acid HF in the electrolyte is reduced to less than 20ppm, the dissolution of HF to LiMn2O4 is reduced, and the capacity and cycle performance of LiMn2O4 are improved
4
Nano magnesium oxide (vk-mg30d) is mixed with an alkali solution as a pH regulator and an ammonia solution as a complexing agent, and added to the mixed aqueous solution containing cobalt salt and nickel salt to coprecipitate Ni Co composite hydroxide
Lithium hydroxide was added to the Ni Co composite hydroxide and the mixture was heat treated at 280-420 ℃
The product is heat treated at 650-750 ℃, which is related to the coprecipitation time
The average particle size of lithium composite oxide decreases or the bulk density increases
When lithium composite oxide is used as anode active material, a high capacitance lithium ion secondary battery can be obtained, and the actual addition amount of nano magnesium oxide (vk-mg30d) depends on the specific formula
With the popularization and use of nano magnesium oxide, it can significantly improve our ecological environment and achieve the effect of energy conservation, which is of great significance to the sustainable development of the country
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