Method for enhancing performance of lithium-sulfur battery by using nanocellulose as adhesive

The invention provides a method for enhancing the performance of a lithium-sulfur battery by using nanocellulose as an adhesive. The method comprises the following steps of: preparing the lithium-sulfur battery by using water as a dispersing agent and the nanocellulose or blending the nanocellulose and a compound containing a polar functional group or directly using the blended nanocellulose and the compound as the adhesive after heating. According to the method disclosed by the invention, cellulose has rich hydroxyl groups and can form hydrogen bonds or covalent bonds with various materials, so that the sulfur cathode is endowed with good mechanical properties, and the problem of volume expansion in circulation can be well relieved. Moreover, cellulose contains a large amount of hydroxyl groups, so that the shuttle effect of polysulfide can be effectively inhibited, and the capacity and the cycle life of the lithium-sulfur battery are greatly improved and prolonged. More particularly, the nanocellulose has e