What are the main materials of lithium battery positive electrode materials?

Key performance indicators of lithium battery positive material include: chemical composition, crystal structure, particle size distribution, resonance density, specific surface area, pH value, first discharge ratio capacity, first charge and discharge efficiency, cycle life, etc. Lithium ion battery performance depends on the structure and performance of the internal material used in the battery, and the positive electrode material is more direct, so the lithium-ion battery positive material must satisfy the basic performance requirements of the lithium ion battery, the performance and price of the positive electrode material are constrained. Lithium-ion battery further towards high energy, long life, and low-cost bottlenecks. In general, the positive electrode material should meet the requirements of the lower part: a, embedded, deod lithium potential. To ensure higher battery, the battery is high; B, embedding, de-lithium capacity is high to ensure the high specific capacity of the battery and the energy; C, in the required charge and discharge potential, there is excellent compatibility with the electrolyte Sex; D, mild electrode process kinetics; E, highly embedded, deod lithium reversible; F, full lithiature in the air is stable in the air; G, raw material is cheap and easy; H, the preparation process is simple. At present, a variety of lithium-ion battery positive materials have emerged in production practices and scientific research, according to the chemical composition of materials. The positive electrode material can be divided into a transition metal embedding oxide, metal oxide, metal sulfide, and other positive electrode materials, and only transition metal-based lithium oxides used in commercial lithium ion batteries, the positive electrode active substance is the most critical Core material, positive material is the basic basis for determining the application direction of lithium battery. The positive electrode is the core component of the lithium battery, and its advantages and disadvantages directly affect the battery performance. The positive electrode material in the lithium ion battery is lithium-containing oxide, the higher the content of the lithium content, the higher the capacity. Mountain in the transition metal, the oxide is the positive material of the current commodified lithium-ion battery. Here, this material is introduced. Transition metal is lithium oxide: LiCoO2 is a positive material for the core for commercial lithium-ion batteries, which belongs to the A-NAFE () 2-type structure, the operating voltage range of 3.5-4.2V, theoretical specific capacity is 274mA. H / g, the utilization rate of lithium during normal charge and discharge is 55 weft -60% 1211, the synthesis method is to mix lithium sources (such as L12CO3) and cobalt sources (such as COCO3), mix in 1: 1, in air in 700- Burning 850 ¡ã C is [22]. In order to obtain a more excellent electrochemical performance, the electrochemical properties such as the reversibility of the composite LiCoO2, 1, ICOO2 are generally added therein, and the electrochemical properties such as discharge capacity, charge and discharge efficiency, operating voltage and stability are added. It is very good, so LiCoo2 has been in a monopoly position from the positive material of the lithium-ion battery from 1990 to the market. However, due to the lack of cobalt resources in nature, LiCO2 has a higher cost, so it is necessary to develop more cheaper and easy-to-have materials, which can significantly reduce the cost of monomer batteries, dried uplioco2, I, IMN2O4, Lifel'O4, etc. A variety of transition metal inconedith lithium compounds. LINIO2 is a lack of layered compound after LiCo2, and the nickel is similar to cobalt, the price is low, the works of 2.5-4.1V, the theoretical specific capacity is 274mA. H / g, the actual maximum capacity is high 200ma. H / g. This material is unared to compose the electrolyte, no pollution environment, low discharge rate, no limit on overcharge and over-discharge, resources relatively 1 and price. It is a very hope that the Moli Energy Company, France SAFT and Canada in recent years, has been using LiniO2 as a positive material for commercial lithium-ion batteries in recent years. The synthesis of LINIO2 is generally mixed with lithium salts and nickel salts to prepare for solid-state reaction, doped other elements (such as Co, Mn, Ga, etc.) can further improve their electrochemical properties. Despite this, LiniO2 preparation and storage problems have highlighted LiNiO2 for the preparation of LiNio2, which makes a slight change, and its structure and electrochemical performance have significant differences, for example, to prepare I and INIO2 for the preparation of tripartite crystals. LINIO2 of a cube crystal, and the cubic, Yi LiniO2 electroless chemical activity. LINI () 2 is easy to decompose during the stored procedure, after a few months, the electrochemical performance is obviously changed, but the LINIO2 is removed in the battery, and the LINIO2 can be released at higher levels to release oxygen, thus the battery Security problem. From these parties, the practical application of LiniO2 is also subject to many restrictions Recommend: LiFePO4 Battery Manufacturer Energy storage battery Manufacturer Integrated machine energy storage battery series Manufacturer Lead lithium battery Manufacturer Outdoor Backup Battery Manufacturer Portable outdoor power supply Manufacturer Power battery Manufacturer Powerwall LiFePO4 Battery Manufacturer Battery rack Manufacturers Telecom LiFePO4 Battery Manufacturer Wall mounted battery storage Manufacturer China Lifepo4 Battery