US 12,258,269 B1
EV-grade lithium sulfide and preparation method for the same
Zhen Lei, Suining (CN); Chuan Xu, Suining (CN); Ge Chen, Suining (CN); Huan Tian, Suining (CN); Liu Yang, Suining (CN); Yibao Gao, Suining (CN); and Xi Lu, Suining (CN)
Assigned to TIANQI LITHIUM CORPORATION, Sichuan (CN)
Filed by TIANQI LITHIUM CORPORATION, Sichuan (CN)
Filed on Jul. 16, 2024, as Appl. No. 18/774,114.
Claims priority of application No. 202311216614.9 (CN), filed on Sep. 20, 2023.
Int. Cl. C01B 17/36 (2006.01)
CPC C01B 17/36 (2013.01) [C01P 2004/61 (2013.01); C01P 2006/40 (2013.01); C01P 2006/80 (2013.01)] 19 Claims
OG exemplary drawing
 
1. 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.