Liquid Electrolyte for Increasing Capacity and Cycling Retention of Lithium Sulfur Battery

摘要

We provide a liquid electrolyte for a lithium-sulfur battery. Electrolytes of the invention may include a protecting additive; a lithium salt (in addition to LiNO3, if that is selected as the protecting additive); at least one electrolyte solvent; and a dissolved electrochemically active material comprising sulfur. In one embodiment an electrolyte includes 0.1-2 M of one or more of LiPF6, LiBF4, LiAsF6, LiClO4, LiCF3SO3, LiN(CF3SO2)2, 0.1-1 M LiNO3, at least one nonaqueous solvent; and dissolved electrochemically active material comprising sulfur in the form of at least one of a soluble lithium polysulfide and/or organodisulfide compounds, which is used in a lithium-sulfur cell and a battery having a plurality of lithium-sulfur cells.

主权项

1. An electrolyte comprising:
a protecting additive; a lithium salt; at least one nonaqueous solvent; and a dissolved electrochemically active material, wherein said dissolved electrochemically active material is selected from soluble lithium sulfide, soluble lithium disulfide, soluble lithium polysulfide, an organodisulfide, and combinations thereof.