What is a lithium-sulfur battery? Introduction to the advantages and disadvantages of lithium-sulfur batteries

Lithium-sulfur battery is a type of lithium-ion battery, which is still in the scientific research stage as of 2013. Lithium-sulfur battery is a kind of lithium ion battery in which sulfur is used as the positive electrode of the battery and metal lithium is used as the negative electrode. Elemental sulfur has abundant reserves in the earth, and has the characteristics of low price and environmental friendliness. Lithium-sulfur batteries using sulfur as the cathode material have higher material theoretical specific capacity and battery theoretical specific energy, reaching 1675mAh/g and 2600Wh/kg, which are much higher than the capacity of commercially widely used lithium cobalt oxide batteries ( u003c150mAh/g). In addition, sulfur is an environmentally friendly element and basically does not pollute the environment. It is a very promising lithium-ion battery. What are the advantages and disadvantages of lithium-sulfur batteries? In addition to very high energy density, lithium-sulfur batteries also have some other advantages. On the one hand, their production costs are relatively low. Since lithium-sulfur batteries mainly use sulfur and lithium as raw materials for production, the production cost is relatively low; on the other hand, lithium-sulfur batteries have low toxicity after use and require less energy for recycling. There are three important problems in lithium-sulfur batteries: 1. Lithium polysulfur compounds are soluble in electrolyte; 2. Sulfur is a non-conductive substance with very poor conductivity, which is not conducive to the high rate performance of the battery; 3. Sulfur is in the charge and discharge process In, the volume expansion and contraction are very large, which may cause damage to the battery. The biggest disadvantage of lithium-sulfur batteries is that their recycling times are relatively low. Because vulcanized polymers have relatively poor stability characteristics, the current cycle times of lithium-sulfur batteries are much lower than ordinary lithium iron phosphate batteries, which greatly increases the cost of using lithium-sulfur 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: Introduction to the correct use and maintenance of high-rate model airplane lithium-ion batteries