Promoting the application of sulfur electrodes in lithium sulfur batteries: a review about the optimization

Abstract

Lithium-sulfur batteries are currently the most widely studied type of batteries with sulfur as the cathode. In addition to having a high energy density and theoretical specific capacity, they also offer the benefits of having a large earth storage capacity, being inexpensive, and being kind to the environment. However, the insulating characteristics, shuttle effect, and bulk effect of sulfur, as well as discharge intermediates, make it difficult to use sulfur electrodes in a broad variety of applications. This paper sorts out and summarizes the feasible solutions and current progress for optimizing sulfur electrodes and further discussed some new perspectives for developing stable and highly-electrochemically active sulfur electrodes.