Introduction to Lithium Manganese Oxide Battery

Lithium manganese oxide batteries are a type of lithium batteries. Regarding the classification of lithium batteries, since their negative electrodes are basically carbon raw materials, the most important classification method in the industry is based on lithium battery cathode materials. The so-called lithium manganate battery refers to a battery that uses lithium manganate material for the positive electrode. So, what are the lithium manganese oxides? It is made of EMD (a raw material used as a special material for mercury-free alkaline manganese batteries) and lithium carbonate (also used as a raw material), with corresponding additives, and processed through the steps of mixing and sintering. Lithium manganese oxide batteries, when we talk about lithium manganate, we say that it has a spinel structure, which refers to the crystal shape used in lithium batteries. When lithium manganate is not used in lithium batteries, it has a layered structure. structure. Relatively speaking, the spinel structure is more stable than the layered structure (although based on chemical properties, it seems that the stability of different shapes in the geometry can also be thought of), so the spinel structure is still used in actual use. In addition to lithium manganese oxide, lithium cobalt oxide and ternary lithium battery positive electrodes are also spinel structures, but the spinel structure of lithium manganese oxide is very distinctive compared with its two counterparts, namely: both advantages and disadvantages Very prominent. Its advantages are: low temperature resistance, good rate performance, and relatively easy preparation. The disadvantages are: the material itself is unstable and needs to be mixed with other materials, poor high temperature performance, poor cycle performance, and fast attenuation. These shortcomings of lithium manganate come from the characteristics of manganese. However, due to the widespread existence of manganese, it has a clear cost advantage. Because the lithium manganate material has such distinctive characteristics, people can use its advantages and suppress its shortcomings to make lithium manganate batteries used in different categories, which are usually referred to as two types of use, A type and B type. Type A refers to lithium-ion batteries used for power, focusing on safety and cycle performance. The requirement is that the reversible capacity is 100~115mAh/g, and it can maintain 80% capacity after 500 cycles. Class B is mainly used in consumer electronics (mobile phones). It is characterized by high capacity. The general requirement is that the reversible capacity is 120mAh/g, but the cycle performance only requires that the capacity be maintained at 60% after 300 to 500 times. The different performances of these two types of batteries are achieved during processing. As mentioned above, the preparation of lithium manganate is relatively simple. If it is to be produced into a positive electrode suitable for A and B batteries, its additives and operating procedures will be different, and different synthesis methods will be used. The details include: high temperature solid phase method, melt impregnation method, microwave synthesis method, co-precipitation method, hydrothermal synthesis method, etc. If each preparation method is described in detail, it is a problem of the manufacturing process. Just know that there are many methods here. That's it. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous article: Analysis of some steps related to lithium battery packaging technology