US 12,258,269 B1 · EV-grade lithium sulfide and preparation method for the same

Abstract

A preparation method for EV-grade lithium sulfide includes: mixing and reacting sulfur powder, metallic lithium and a lithium-containing additive to obtain a crude lithium sulfide product, and then pulverizing and calcining the crude lithium sulfide product to remove excess sulfur powder to obtain the EV-grade lithium sulfide. The method being used for preparing the lithium sulfide is advantaged in simple process, strong operability, large-scale production, and being capable to meet the requirements for safe operation and EV-grade lithium sulfide, without toxic gas generation and secondary pollution.

Claims19

Dependent claims

A preparation method for EV-grade lithium sulfide, comprising:

mixing and reacting sulfur powder, metallic lithium and a lithium-containing additive to obtain a crude lithium sulfide product, and then pulverizing and calcining the crude lithium sulfide product to remove excess sulfur powder to obtain the EV-grade lithium sulfide, wherein the lithium-containing additive is at least one of lithium hydride, lithium nitride and lithium carbide;
and
the molar ratio of the sulfur powder, the metallic lithium and the lithium-containing additive is 1:2:0.1-0.3.

Dependencies are inferred from the claim text.

EV-grade lithium sulfide and preparation method for the same

Life of this patent

EV-grade lithium sulfide and preparation method for the same

Life of this patent

Abstract

Claims19