Requirements and effects of lithium battery barriers

Lithium battery isolation requirements 1. It has electronic insulation to ensure the mechanical separation of positive and negative electrodes. 2. It has a certain pore size and porosity to ensure low resistance and high ion conductivity, and has good permeability to lithium ions. 3. Since the solvent of the electrolyte is a strong polar organic compound, the barrier must be resistant to corrosion by the electrolyte and have satisfactory chemical and electrochemical stability. Fourth, it has good wettability to electrolyte and has satisfactory liquid absorption and moisture retention ability. 5. It has satisfactory mechanical functions, including puncture strength, tensile strength, etc., but the thickness is as small as possible. 6. Good spatial stability and smoothness. Seven, thermal stability and active shutdown maintenance function is good. Power lithium-ion batteries have higher requirements for barriers, and composite membranes are generally used. The effect of the barrier of lithium batteries This barrier is to guard against the passage of electrons, so that the electrons can only go through the external circuit, so that current will occur in the external circuit. But this barrier allows lithium ions to pass through. The barrier of the lithium battery can also prevent the positive and negative electrodes from being touched straight. If the positive and negative electrodes are touched straight, it will short-circuit and the battery may explode and catch fire. In the process of using lithium batteries, do not bend the battery or puncture the battery, as this may break the barrier. If the barriers between lithium batteries are broken, it is very risky. Lithium battery is a kind of battery with excellent functions. This kind of battery has high energy density and light weight. The batteries we usually use in mobile phones, tablets, and laptops are all lithium batteries. There are two kinds of lithium batteries used in pure electric cars, one is lithium iron phosphate battery, and the other is ternary lithium battery. The energy density of the ternary lithium battery is higher than that of the lithium iron phosphate battery, but the safety of the lithium iron phosphate battery is better than that of the ternary lithium battery. The ternary lithium battery starts to burn at 200 degrees Celsius, but the lithium iron phosphate battery starts to burn at 800 degrees Celsius. Most pure electric cars use ternary lithium batteries because they are lighter and have higher energy density. And many car manufacturers have done a lot to improve the safety of ternary lithium 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: Analysis of the advantages of lithium manganese phosphate battery cathode materials