公开(公告)号：US20250079464A1

公开(公告)日：2025-03-06

申请号：US18460788

申请日：2023-09-05

Applicant: GM Global Technology Operations LLC

Inventor： Nathaniel Hardin ,  Yifan Zhao ,  Robert D. Schmidt ,  Fang Dai

IPC: H01M4/60 ,  C08F136/06 ,  H01M4/137 ,  H01M4/62 ,  H01M10/0525

Abstract: Organosulfur cathodes having low porosity and reduced surface area for lithium-sulfur batteries generally include sulfurized poly(1,2-butadiene), wherein the sulfurized poly (1, 2-butadiene) is a reaction product of a poly (1, 2-butadiene) monomer and a cyclic octaatomic sulfur; conductive carbon; and a binder. Optionally, the reaction product that further includes co-monomers including an alkene functionality. The co-monomers can include one or more sulfide groups selected from the group consisting of sulfide, disulfide, and polysulfide.

公开(公告)号：US20240413386A1

公开(公告)日：2024-12-12

申请号：US18330649

申请日：2023-06-07

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Xingcheng Xiao ,  Robert D. Schmidt ,  Yifan Zhao

IPC: H01M10/0562

Abstract: A method to create a garnet-based solid electrolyte separator for a battery cell is provided. The method includes coating a garnet-based material powder, initially including a lithium carbonate layer upon an outer surface of the garnet-based material powder, with aluminum fluoride to create a fluoride-treated garnet-based material powder. The method further includes operating a solid-state reaction upon the fluoride-treated garnet-based material powder, such that the aluminum fluoride reacts with the lithium carbonate layer to create aluminum oxide, carbon dioxide, and lithium fluoride. The solid-state reaction creates a fluoride-treated and solid-state reacted garnet-based material powder including the aluminum oxide and the lithium fluoride. The method further includes sintering the fluoride-treated and solid-state reacted garnet-based material powder including the aluminum oxide and the lithium fluoride. The sintering includes applying pressure upon the fluoride-treated and solid-state reacted garnet-based material powder to densify the powder and create the separator.