METHOD FOR PRODUCING LITHIUM-SULFUR CATHODE Russian patent published in 2023 - IPC H01M4/04 H01M10/52 

FIELD: chemical and electrical industries.

SUBSTANCE: manufacture of positive electrode materials for lithium-sulfur batteries. A membrane with mixed (ionic and electronic) conductivity is used together with a carbon matrix to stabilize and retain sulfur, sulfides and lithium polysulfides. This technical result is achieved by introducing into the matrix a carbon carrier with a highly developed surface of lithium sulfides and polysulfides, resulting from the reduction of lithium methanesulfonate and their subsequent homogeneous mixing with a membrane with mixed (ionic and electronic) conductivity. The method for producing a lithium-sulfur cathode has a number of advantages: an alternative method for producing lithium sulfide from lithium methanesulfonate is used, at a lower temperature compared to reduction with lithium sulfate; uniform distribution of lithium sulfides and polysulfides in a carbon carrier with a high developed surface and components in the polymer matrix of the membrane favorably affects the stabilization of sulfur, and, consequently, an increase in the capacity and cycle life (service life) of the lithium-sulfur cathode.

EFFECT: development of a method for producing a lithium-sulfur cathode with a high specific energy density for a lithium-sulfur battery.

2 cl, 5 dwg, 9 ex, 1 tbl