LaB6 as a Functional Separator Modifier for Improved Lithium Sulfur Batteries

Abstract

Metal borides have excellent chemical and electrochemical stability, high electrochemical sensitivity, and abundant active sites. According to experiments, metal borides can greatly reduce the shuttle effect in lithium-sulfur batteries and boost their electrochemical performance when used as sulfur host materials. In this thesis, we use polar lanthanum boride materials as materials for lithium-sulfur batteries that modify separators, and take advantage of its strong chemical bonding with polar polysulfides to reduce the shuttle effect. The experimental data demonstrate that the polar lanthanum boride can significantly improve the overall reaction kinetic performance as well as cyclic stability of the cell, resulting in excellent electrochemical performance.