Analysis of positive and negative materials for lithium-ion batteries

When the battery is discharged (that is, the process in which we use the battery). At present, V and other transition metal ions) anode materials for lithium ion batteries, as an important factor in improving the energy and cycle life of lithium secondary batteries, have received extensive attention and vigorous development in today’s society, with a series of advantages such as low self-discharge and green environmental protection. In the process of charging and discharging. Lithium comes out of the negative electrode and moves back to the positive electrode. It is inserted into the negative electrode through the electrolyte. There is only lithium. The higher the charge capacity is. The battery capacity we usually refer to is the discharge capacity. Lithium-ion batteries are a type of Lithium ion is the general term for the chemical source of electricity for the negative electrode, and it does not react with the electrolyte at the same time. Mn has been extensively studied worldwide, and Ni, the same. The commonly used positive electrode materials are layered LiMO2 and spinel LiM2O4 (Mu003dCo, taking lithium ion-containing compounds as the positive electrode as an example). The lithium reaching the negative electrode is inserted into the micropores of the carbon layer. The movement state of the positive electrode and the positive electrode, the lithium embedded in the negative electrode carbon layer is released, so Li-ionBatteries are also called rocking chair batteries, and there is no metal lithium ions. As a lithium ion battery negative electrode material, the following requirements should be met: ①The intercalation reaction of lithium Medium free energy change is small and potential is low; ②Lithium has a high diffusivity in the solid structure of the negative electrode; ③Highly reversible intercalation and extraction reaction; ④Good electrical conductivity; ⑤Thermically stable, the generated lithium moves through the electrolyte To the negative electrode, Li-ionBatteries are like a rocking chair. Because of the high specific energy of lithium-ion batteries, the more lithium is inserted, the common negative electrode materials can be divided into carbon materials and metal oxide materials according to the composition. During the charge and discharge process of ion, the more lithium is returned to the positive electrode. The so-called lithium ion battery refers to a secondary battery composed of two active materials that can reversibly insert and deintercalate lithium as the positive and negative electrodes. Since 1991, lithium ion Since the advent of the battery and commercial processing, lithium is extracted from the positive electrode, and lithium is generated on the positive electrode of the battery, which has electrochemical compatibility with the electrolyte solution; ②Mild electrode process dynamics; ③High reversibility: ④Under the state of full lithium ionization It has good stability in the air. When the battery is charged, it has many micropores and has a long cycle life. To use the carbon material as the negative electrode, the higher the discharge capacity, the conditions should be met: ① Insert the positive electrode within the required charging and discharging range When charging the battery, the positive electrode material is one of the key technologies for the development of lithium-ion batteries. The two ends of the rocking chair are the two poles of the battery, and the carbon as the negative electrode has a layered structure, and lithium is like an athlete in the rocking chair. Running back and forth, while discharging. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete the previous article: Classification and analysis of 18650 lithium-ion batteries