What are the advantages and disadvantages of lithium sulfur battery?

Lithium sulfur battery is a kind of lithium battery, which is still in the scientific research stage as of 2013. Lithium sulfur battery is a kind of lithium battery with sulfur as the positive electrode and metal lithium as the negative electrode. The elemental sulfur is abundant in the earth and has the characteristics of low price and environmental friendliness. The theoretical specific capacity of lithium sulfur battery using sulfur as cathode material and the theoretical specific energy of battery are higher, reaching 1675m Ah/g and 2600Wh/kg respectively, which is much higher than the capacity of lithium cobalate battery widely used in commerce (<150mAh/g). Moreover, sulfur is an environmentally friendly element, which basically does not pollute the environment. It is a very promising lithium battery. What are the advantages and disadvantages of lithium sulfur battery? How does the lithium sulfur battery work?

What are the advantages and disadvantages of lithium sulfur battery?

In addition to the very high energy density, lithium sulfur battery also has some other advantages. On the one hand, its production cost is relatively low. As the lithium sulfur battery mainly uses sulfur and lithium as the production raw materials, the production cost is relatively low; On the other hand, lithium sulfur batteries are low toxic after use, and the energy consumption for recycling is small.

Lithium sulfur battery has three main problems: 1. Lithium polysulfide compounds are soluble in electrolyte; 2. As a non-conductive material, sulfur has very poor conductivity, which is not conducive to the high rate performance of the battery; 3. During the charging and discharging process, the sulfur volume expands and shrinks greatly, which may lead to battery damage. The biggest disadvantage of lithium sulfur battery is its low recycling times. Due to the poor stability of sulfurized polymer, the current cycle times of lithium sulfur battery are much lower than that of ordinary lithium iron phosphate battery, which greatly increases the use cost of lithium sulfur battery.