Advantages of lithium battery separators and introduction to separator materials

Advantages of lithium battery separator 1. Heat resistance: Strengthen the high temperature resistance of battery separator 2. Ultra-thin separator: The pursuit of capacity for lithium batteries requires the development of thin film. 3. The liquid absorption performance of the separator: can increase the capacity of the battery Introduction to Lithium Battery Separator Materials In the structure of lithium batteries, the diaphragm is one of the key internal components. The performance of the diaphragm determines the interface structure and internal resistance of the battery, which directly affects the battery's capacity, cycle, and safety performance. A diaphragm with excellent performance has an important purpose for improving the overall performance of the battery. The main purpose of the separator is to separate the positive and negative electrodes of the battery to prevent the two poles from contacting and short-circuit. In addition, it also has the function of allowing electrolyte ions to pass through. The diaphragm material is non-conductive, and its physical and chemical properties have a great influence on the performance of the battery. Commercial lithium battery separator products are mostly microporous membranes made of polyolefin materials. Polyolefin materials have the advantages of high strength, good acid and alkali corrosion resistance, water resistance, chemical resistance, good biocompatibility, and non-toxicity. Prepared and mature. The factors that affect the diaphragm include thickness, air permeability, wettability, pore structure and porosity, thermal stability and consistency. Excellent performance separators have important uses to improve the overall performance of power lithium batteries, so higher requirements are put forward for the use of lithium battery separators: (1) It must have good insulation to prevent short-circuiting of the positive and negative electrodes or being Short circuit caused by puncture of burrs, particles and dendrites; (2) It has sufficient puncture strength, tensile strength, etc., and basically maintains dimensional stability under sudden high temperature conditions, and will not shrink and cause a large area of u200bu200bthe battery Short circuit and thermal runaway; Statement: Some pictures and content of articles published on this site are from the Internet, if there is any infringement, please contact to delete the previous article: What are the precautions for the safe use of lithium batteries