What is the basis of common negative electrode materials for lithium-ion batteries?

The negative electrode material is an important component, which can have a greater impact on the overall performance of the lithium-ion battery. At present, negative electrode materials are mainly divided into two categories, one is carbon materials for commercial applications, such as natural graphite, soft carbon, etc., and the other is in the state of research and development, but the market prospects are promising for non-carbon negative electrodes. , Such as silicon matrix material, alloy material, tin-gold material and so on. The negative electrode of the lithium ion battery is made by mixing the negative active material carbonaceous material or non-carbonaceous material, the binder and the additives to make a paste-like glue, which is evenly smeared on both sides of the copper foil, and then dried and rolled. The negative electrode material is the main body of lithium-ion batteries to store lithium, allowing lithium ions to be inserted and extracted during the charging and discharging process. When a lithium-ion battery is charged, the lithium atoms in the positive electrode are ionized into lithium ions and electrons, and the lithium ions move toward the negative electrode to synthesize lithium atoms with the electrons. During discharge, lithium atoms are ionized from the outer appearance of the negative electrode in the graphite crystal into lithium ions and electrons, and lithium atoms are synthesized at the positive electrode. ●Carbon anode material This example of material is a balanced anode material in terms of energy density, reincarnation capacity, or cost input, etc., and it is also an important material that promotes the birth of lithium-ion batteries. Carbon materials can be divided into two Major categories, namely graphitized carbon materials and hard carbon. Among them, the former mainly includes artificial graphite and natural graphite. ●Natural graphite Natural graphite also has many advantages. Its crystallinity is higher, there are more places where it can be inserted, and its value is lower. It is a more ambitious material for lithium-ion batteries. But it also has certain loopholes, such as poor compatibility when it reverberates with the electrolyte, and many defects in its appearance when it is destroyed, which will have a relatively unlucky effect on its charging or discharging performance. From a technical point of view, the negative materials of lithium-ion batteries will have diverse characteristics in the future. The positive electrode material is one of the key materials to determine the performance of the lithium-ion battery. The positive electrode material has always been the focus of the lithium-ion battery, and its choice directly determines the ups and downs of the battery performance. 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: What is the difference between lithium-ion batteries and storage batteries?