Quickly understand lithium manganate

1. what is lithium manganate

Lithium manganate is the 1 kind of inorganic compounds, chemical formula is LiMn2O4, usually spinel phase, black gray powder, soluble in water, it mainly includes spinel type lithium manganate and layered structure lithium manganate, which spinel type lithium manganate structure is stable, has excellent rate performance, easy to realize industrial production, therefore, the practical application of the spinel structure is still used. Lithium manganate battery refers to the positive use of lithium manganate material battery, its nominal voltage in 2.5~4.2V.

2. Characteristics of lithium manganate

Lithium manganate has the advantages of abundant resources, low cost, no pollution, good safety, low temperature resistance, good rate performance, and relatively easy preparation. It is an ideal cathode material for power batteries. The disadvantage is that the material itself is not stable, it needs to be mixed with other materials, and the high temperature performance is poor, the cycle performance is poor, and the attenuation is fast. These disadvantages of lithium manganate are due to the characteristics of manganese, but due to the widespread existence of manganese, it has a significant cost advantage. Compared with other cathode materials, lithium manganate does not contain Ni, Co and other elements, and its cost is cheaper than ternary materials and lithium cobaltate. Compared with lithium iron phosphate, although its specific capacity is lower, its voltage platform is higher, and its weight specific energy (the amount of electricity that can be released by a battery or active substance per unit mass) is close, but lithium manganate has higher compaction density, and its volume specific energy (the amount of electricity that can be released by a battery or active substance per unit volume) is more advantageous than lithium iron phosphate.

2.Characteristics of lithium manganate

Lithium manganate has the advantages of abundant resources, low cost, no pollution, good safety, low temperature resistance, good rate performance, and relatively easy preparation. It is an ideal cathode material for power batteries. The disadvantage is that the material itself is not stable, it needs to be mixed with other materials, and the high temperature performance is poor, the cycle performance is poor, and the attenuation is fast. These disadvantages of lithium manganate are due to the characteristics of manganese, but due to the widespread existence of manganese, it has a significant cost advantage. Compared with other cathode materials, lithium manganate does not contain Ni, Co and other elements, and its cost is cheaper than ternary materials and lithium cobaltate. Compared with lithium iron phosphate, although its specific capacity is lower, its voltage platform is higher, and its weight specific energy (the amount of electricity that can be released by a battery or active substance per unit mass) is close, but lithium manganate has higher compaction density, and its volume specific energy (the amount of electricity that can be released by a battery or active substance per unit volume) is more advantageous than lithium iron phosphate.

3. preparation method

There are many kinds of preparation methods of spinel type lithium manganate, mainly including high temperature solid phase method, melt impregnation method, microwave synthesis method, sol-gel method, co-precipitation method and hydrothermal synthesis method. Today, the main lithium manganate on the market has two types of AB, Class A refers to the material used in power batteries, which is mainly characterized by safety and circularity. Class B refers to the replacement of mobile phone batteries, which is mainly characterized by high capacity.

The production of lithium manganate is mainly produced by EMD (electrolytic manganese dioxide) and lithium carbonate as raw materials, with corresponding additives, through mixing, firing, post-treatment and other steps. Considering the characteristics of raw materials and production processes, the production itself is non-toxic, environmentally friendly, does not produce waste water and waste gas, and the powder in production can be recycled, so it has no impact on the environment.

4.Application and Prospect of Lithium Manganate in Battery Field

Lithium manganate is one of the most important materials in lithium-ion batteries at present. It is mainly used to manufacture lithium-ion battery cathode materials for mobile phones, notebook computers and other portable electronic devices. It can also be mixed with ternary materials and is widely used in electric Vehicles, smart phones, tablet computers and other fields. At present, the domestic manufacturers involved in lithium manganese acid mainly have Boshi Gaoke, Xinxiang Hongli, Southern Manganese, Jiaozuo partner (polyfluoro), dry transport Gaoke, Guizhou Best, Xinxiang Zhongtian, Hunan Haili, Hunan Xinda and so on. Among them, Boshi Gaoke ranked first in the industry, with a market share of more than 30%. At present, with the rapid development of products such as electric vehicles and smart phones, the market demand for lithium-ion batteries is increasing. Lithium manganate has high specific energy, low cost and excellent thermal stability, which makes it have broad application prospects in the field of lithium-ion batteries. In the future, with the continuous development and progress of science and technology, lithium manganate may be used in more fields.