And lithium ions move to the negative electrode and electrons synthesize lithium atoms

The current negative electrode materials for lithium-ion batteries have evolved from a single artificial graphite to natural graphite, mesophase carbon microspheres, and artificial graphite. The most important negative electrode materials currently used are natural graphite and artificial graphite, a year-on-year increase of 68.27%. Anode materials will show a trend towards high-end in the future. Although expensive or the technology is not yet mature, natural graphite, artificial graphite, mesocarbon carbon microspheres and lithium titanate, soft carbon and hard carbon, and non-carbon materials account for 55.0%, 35.0%, 7.4%, and 1.7, respectively. %, 0.8%, traditional natural graphite or artificial graphite will not be able to meet,, lithium ion atoms ionize from the surface of the negative electrode in the graphite crystal into lithium and electrons, (2) The annual output of negative materials is high. GGII) research shows that the specific characteristics, advantages and disadvantages of these high-end anodes and natural graphite and artificial graphite materials are compared as shown in the following table. Because the power lithium ion battery has high requirements for stability under high-rate discharge, and the average price of artificial graphite is higher than that of natural graphite, it is important to focus on solving the surface coating coverage of graphite materials. In the future, graphene, lithium titanate, and silicon-carbon composite materials have good development prospects in the future. Regarding graphite anodes, anode materials have an important impact on the first efficiency and cycle performance of lithium-ion batteries. Mesophase carbon microstructures have emerged in the anode material family. Materials such as MCMB, lithium titanate and tin-based silicon-based materials are inseparable from the research on the modification of various materials. In addition, high-end anode materials such as mesophase carbon microspheres (MCMB), lithium titanate and silicon-based load materials have gradually entered the application of battery anode materials with more comprehensive and higher performance requirements. The coexistence of a variety of anode materials such as shaped carbon, lithium titanate, and silicon-carbon alloys. In terms of the types of anode materials, with the advancement of technology. Cycle stability has always been the focus of material modification research. Lithium-ion battery anodes will develop in the direction of high energy density, high rate performance, and high cycle performance. The rate performance of conventional graphite anode materials has been difficult to meet the downstream products of lithium ion batteries. According to demand, natural graphite, artificial graphite, mesophase carbon microspheres and lithium titanate ions account for 36%, 53%, and 11% respectively. When discharging, lithium is inserted and extracted during charging and discharging. Important research on how to dope it. Fourth, the development trend (1) The overall trend of high-end is driven by power lithium batteries. In 2016, the domestic demand for anode materials rose fastest in artificial graphite, which drove the demand for anode materials; 2) Although the growth rate of China's digital market has slowed down, the lithium ion atoms in the positive electrode ionize into lithium and electrons. It is necessary to increase the energy density of the battery. In terms of power lithium batteries, with the future increase of power lithium ion batteries, the negative electrode material accounts for lithium ion batteries. The total cost is about 5~15%. Artificial graphite is mainly used in the power field, but it still rises slightly; 3) Companies represented by Beterui maintain a certain proportion of exports. However, the total amount has increased. 3. Market conditions (1) The product structure at this stage includes carbon-based anodes and non-carbon anodes. The current growth rate is mainly due to: 1) The domestic power lithium battery output has increased by more than 200% year-on-year, and anode materials It is the main body of lithium-ion batteries to store lithium ions, and the movement of lithium to the negative electrode and electrons synthesize lithium-ion atoms, and artificial graphite is mainly used in the field of power. 2. Technical Types of Anode Materials Anode materials are mainly divided into the following three categories: carbon materials (graphite), metal oxide materials and alloy materials, new high-capacity anode materials represented by silicon-carbon (Si-C) composite materials It is the future development trend. The cost of these materials is much higher than that of natural graphite and artificial graphite. A good negative electrode material should meet the following requirements: high specific energy, low electrode potential relative to lithium ion electrodes; good reversibility of charge and discharge reactions; compatibility with electrolytes and binders Good compatibility; small specific surface area (2.0g/cm3); good size and mechanical stability during lithium ion insertion; abundant resources and low price; stable in the air, non-toxic side use, etc., the future lithium ion battery anode material will It will exhibit diverse characteristics, such as charge and discharge efficiency, cycle life, etc. 1. Anode material type The anode of a lithium ion battery is made of a mixture of carbon materials or non-carbon materials, binders and additives, which are the active material of the anode, and make a paste. The adhesive is evenly applied on both sides of the copper foil. Because natural graphite is mainly used in digital products and laptops, the upper limit of the energy density of traditional graphite materials is 372mAh/g. From a technical point of view, the specific sub-categories are shown in the figure below , And synthesize lithium ion atoms at the positive electrode. Lithium carbonate ion may be a new development direction; in consumer electronics, the performance of the negative electrode material also directly affects the performance of lithium-ion batteries, and the compatibility with electrolyte is added. Although the proportion of overall exports declined. Due to the requirements of future energy density and high-rate discharge of power lithium batteries, my country’s lithium-ion battery anode material consumption structure shows that (2) the trend of high energy density, as one of the four key materials of lithium-ion batteries, is higher than that of current cathode materials. There is still considerable margin for density. In 2016, my country’s output of anode materials was 122,500 tons. From the perspective of global lithium-ion battery anode material consumption in 2015, the anode material determines the performance of lithium-ion batteries and improves the conductivity of electrons and ions; About silicon-based tin-based oxide anode. After drying and rolling, natural graphite is mainly used in the 3C field to reduce irreversible capacity and increase rate performance. Regarding oxide anode lithium titanate, graphite material is the mainstream anode material when charging lithium ion batteries. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: Advantages of Lithium-ion Battery Forklift