/ - A nano-composite of V2O5 xerogel and carbon and cathode for rechargeable lithium sulfur battery comprising the same and preparation process thereof

摘要

The present invention provides a method for solving the problem of dissolving a lithium polysulfide into an electrolyte, which is one of the main problems associated with a lithium-sulfur secondary battery. When the method of the present invention is used, sulfur formed on the carbon black reacts with lithium to form lithium polysulfide, and when it is dissolved in the electrolyte, the V ₂ O ₅ -gel gel / carbon black nanocomposite contained in the electrode is trapped The polysulfide ion can not easily dissolve in the electrolyte, and it remains in the electrode. As a result, the amount of polysulfide diffused into the cathode can be drastically reduced, so that the shuttle reaction is suppressed and the amount of overcharge between charge and discharge is reduced. The problem of extremely low electric conductivity of sulfur, which is one of the problems of another lithium-sulfur secondary battery, can be solved.