Is the 818 battery safer than the 523 battery?

Is the 818 battery safer than the 523 battery? If your guess is correct, then the 818 battery in question should be the 811 battery, which is one of the three lithium batteries. At present, the power lithium-ion battery used in electric vehicles is a lithium battery. According to its positive electrode data, it can be divided into lithium iron phosphate batteries and ternary lithium batteries. The so-called ternary lithium battery refers to a battery containing three kinds of information in the positive electrode of a lithium battery. For example, Tesla uses its own brand of ternary nickel cobalt aluminum (NCA) and ternary nickel cobalt manganese (NCM). According to the technical level and actual processing requirements of the battery manufacturer, the three types of information for the positive electrode of the ternary lithium battery can be freely allocated according to a certain ratio, such as nickel-cobalt-aluminum or nickel-cobalt-manganese in a ratio of 5:2:3, called 523 batteries; Under the ratio of 3:3:3, it is called 333 battery; under the ratio of 6:2:2, it is called 622 battery. The energy density of battery products varies according to the ratio of various data. The energy density of a ternary lithium battery depends importantly on the proportion of nickel in the positive electrode of the battery. The higher the nickel content, the higher the energy density of the battery. 811 battery refers to a lithium battery with 90% nickel and 10% cobalt and manganese (or aluminum) in the positive electrode of the battery. Under the existing technology, the 811 battery is the lithium battery with the highest energy density. For example, the energy density of the NCM811 battery developed by CATL is 240Wh/kg, while the energy density of the battery pack is 170Wh/kg. After being applied to GAC New Energy's AionS, it can easily reach 500 kilometers. In an environment where the continued mileage of electric vehicles is an important pursuit policy, the 811 battery has become a product developed by major battery manufacturers. image of. The nickel content of the positive electrode of the PNG battery will not only increase the energy density of the battery, but also reduce the safety and stability of the battery. At the same time, in order to increase the proportion of nickel in the positive electrode, the 811 battery reduces the use of cobalt and manganese, and cobalt plays a stable role in the positive electrode. On the one hand, the increase in nickel content reduces the stability of the battery; on the other hand, the increase in cobalt content reduces the stability of the battery. Therefore, the safety performance of the 811 battery will definitely be lower than that of other types of ternary lithium batteries, and the service life will be relatively short. The positive electrode of the 523 battery is 5:2:3 of nickel-cobalt-manganese or nickel-cobalt-aluminum. Compared with the 811 battery, the nickel content is lower and the cobalt content is higher, so although the energy density is relatively low, it is safer and more stable. Therefore, the 811 battery is not as safe as the 523 battery. The theory and energy of the ternary 523811 are the same, right? What is the relationship between the theoretical capacity of the ternary positive data and the nickel content. The capacity of the theoretical ternary data is calculated as follows: The mass score of each ternary data is calculated at 3 yuan 523 The theoretical calculation capacity of ternary 523 (LiNi0.5Co0.2Mn0.3O2) The relative mass fraction of ternary 523 calculated by theoretical gram capacity is 96.5545g/mol 1g substance: now 96.5545g/mol, 1gu003d0.01035685mol1g, the cost of the 523 supply Amount: Mol, 0.01035685x96485.3383C/Molu003d999.284176C Conversion unit: 999.284176 degrees Celsius u0026pide; 3.6cu003d277.58 mAh so the theoretical gram capacity is 280mAh/g three yuan 811 (LiNi0.8Co0.1Mn0.1O2) theory The relative mass fraction of NiCoMn calculated by gram capacity is similar, so the theoretical gram capacity of 523 and 811 are similar. Theoretical and actual gram capacity. So the question is, why is the gram capacity of 811 larger than the gram capacity of 523? The capacity and total content of nickel and cobalt, on the contrary, because the cobalt content generally does not change often, it is 0.2 or 0.3, and then the most directly related is The content of nickel and nickel in the ternary information +2+3 valence state and two valence states, when the lithium ion transition metal nickel intends to reach equilibrium. Because of the multivalent state of nickel, it can go from +2 to +3 to +4, so the more nickel, the more lithium. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete.