Lithium-ion battery in the process of use, can be recharged, belongs to a secondary rechargeable battery, the main working principle is the repeated movement of lithium ions between the positive and negative electrodes, regardless of the shape of the battery, its main components are electrolyte, positive plate, negative plate and diaphragm. With the continuous development of lithium-ion batteries, the application field is also gradually expanding, and the use of positive electrode materials has changed from a single to a diversified direction, including: olivine type lithium ferrous phosphate, lithium cobalt oxide layer, spinel type lithium manganate, and so on, to achieve the coexistence of a variety of materials.
Magnesium Oxide Nanopowder is a new kind of nano-particle material, white powder appearance, high purity, large specific surface area, composed of fine grains, with obvious small size effect, surface effect, quantum size effect and macro tunneling effect, no gas in the electrode, surface regeneration is easy, hydrogen and oxygen overpotential is small, cheap and other characteristics.
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Nano-magnesium oxide added to the lithium battery brief introduction:
1. Choose to add 10-100g/L of TiO2, SiO2, Cr2O3, ZrO2, CeO2, Fe2O3, BaSO, SiC, MgO and other insoluble solid particles with a diameter between 0.05-10μm for lithium-ion batteries. The prepared material as lithium ion has the characteristics of good charge and discharge efficiency, high specific capacity and stable cycle performance.
2. Lithium battery cathode material, the nano magnesium oxide as a conductive dopant, through solid phase reaction to generate magnesium doped lithium iron manganese phosphate, and further made into a nanostructured cathode material, its conductivity can reach 10-2S/cm, the actual discharge capacity of 240mAh/g. The new cathode material has the characteristics of high energy, environmental protection and low cost, which is suitable for liquid and colloidal lithium-ion batteries, small and medium-sized polymers, especially for high-power power batteries.
3. Optimize the capacity and cycle performance of spinel lithium manganate batteries. In the lithium ion battery electrolyte with spinel lithium manganate as the positive electrode material, nano-magnesium oxide is added as the acid removal agent, 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 20ppm, the dissolution effect of HF on LiMn2O4 is reduced, and the capacity and cycle performance of LiMn2O4 is improved.
4. Nano magnesium oxide powder as a pH regulator of the alkali solution and an ammonia solution as a complexing agent mixed, and added to the cobalt salt and nickel salt mixed aqueous solution, co-precipitation Ni-CO complex hydroxide. Lithium hydroxide was added to Ni-CO complex hydroxide and the mixture was heat treated at 280-420℃. The resulting product is heat treated in an environment of 650-750 ° C, which is related to the time of co-precipitation, and the average particle size of lithium composite oxide decreases or the bulk density increases. When 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 nano-magnesium oxide is subject to the specific formula.
With the promotion 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 for the sustainable development of the country.
Post time: Feb-04-2024