What are the cathode materials for lithium-ion batteries

The choice of cathode material is mainly based on the following considerations: a higher oxidation-reduction reaction potential, so that the lithium-ion battery can reach a higher output voltage; the high content of lithium elements and high material packing density make lithium-ion batteries have a higher The energy density of the chemical reaction process should be good, so that it has a long cycle life; the electrical conductivity should be high, so that it has a good charge and discharge rate performance; the chemical stability and thermal stability should be good, and it is not easy to decompose and heat. Let lithium-ion batteries have good safety. Therefore, the cathode materials of lithium-ion batteries are divided into the following categories: the first has a layered structure of lithium cobalt oxide and lithium nickel oxide cathode materials; the second has a spinel structure of lithium manganese oxide cathode materials; the third has Lithium iron phosphate cathode material with olivine structure; in addition, there are ternary materials. The theoretical specific capacity of lithium iron phosphate cathode material is 170mA/g, and the voltage platform is 3.7V. It has good thermal stability, low moisture absorption and excellent charge-discharge cycle performance in the fully charged state, so it has become the current driving force. The focus of research and production development in the field of energy storage batteries. Among them, the commercial application of lithium cobalt oxide was the earliest. The first-generation commercial application of lithium ion batteries was the lithium cobalt oxide battery that SONY introduced to the market in 1990, and it was subsequently used in consumer products on a large scale. The commercial application of lithium manganate is important in the field of power lithium batteries and is a relatively important branch of lithium ion batteries. For example, Nissan's leaf pure electric car uses the Japanese AESC company's lithium manganate battery, and the early Chevrolet Volt also uses South Korea's LG Chem's lithium manganate battery. 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 post: What voltages are available for lithium-ion batteries