What are the uses of lithium battery anode and cathode materials?

The use of positive and negative electrode materials for lithium batteries ●The use of positive and negative electrodes for lithium batteries The positive electrode material has always been the core of lithium batteries, and its choice directly determines the level of battery performance. They have a higher electrode potential relative to lithium, which ensures that the battery has a higher open circuit voltage. Each positive electrode material has its theoretical energy density. When a positive electrode material is selected, the upper limit of the energy density of the cell is selected. The amount design of the positive electrode material and the tap density in the production process also have an impact on the energy density of the finished battery cell. Lithium battery cathode materials should exert the best performance in the whole battery. Under the premise of optimizing the material composition, the crystal structure, particle structure and morphology of the material, particle surface chemistry, material packing density and compaction density should be further optimized. Chemical properties, and at the same time, we must strictly prevent the introduction of trace metal impurities in the process. Of course, stable, high-quality large-scale processing is an important guarantee for the stable performance of materials in battery manufacturing. ●Anode material use The negative electrode of a lithium battery is made by mixing the negative active material carbon material or non-carbon material, binders and additives to form a paste glue that is evenly smeared on both sides of the copper foil, dried and rolled. The key to the successful manufacture of lithium batteries lies in the preparation of negative electrode materials that can reversibly release/intercalate lithium ions. A more ideal negative electrode material must have at least the following 7 conditions: ①The chemical potential is low, forming a large potential difference with the positive electrode material, so as to obtain a high-power battery; ②It should have a higher cycle specific capacity; ③Li+ in the negative electrode material It should be easy to intercalate and deintercalate, with high Coulombic efficiency, so that there can be a more stable charge and discharge voltage during the Li+ deintercalation process; ④have good electronic conductivity and ion conductivity; ⑤have good stability, right The electrolyte has a certain degree of compatibility; ⑥The source of materials should be rich in resources, low in price, and simple in manufacturing process; ⑦Safe, green and pollution-free. As far as the current market is concerned, in terms of large-scale commercial applications, anode materials are still dominated by carbon materials, and both graphite and non-graphite carbon materials are used. In the fields of automobiles and power tools, lithium titanate also has certain applications as a negative electrode material. It is important to have very excellent cycle life, safety and rate performance, but it will reduce the energy density of the battery, so it is not the mainstream of the market. Disclaimer: Some pictures and content of the articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous article: How to properly use and protect the battery in daily life?