University of California

Lg Energy Solution, Ltd.

Min-Sang Song

Jeong Woo Oh

Ke Zhou

Mengchen Liu

Jung-Pil Lee

Jiyoung Kim

Dong Ju Lee

Zheng Chen

Junghwa Hong

Disclosed is a solid electrolyte membrane, a method for manufacturing the same, and an all-solid-state battery containing the same. More specifically, the solid electrolyte membrane includes a first solid electrolyte layer and a second solid electrolyte layer stacked adjacent to each other, and the first solid electrolyte layer has a structure in which particulate binders are dispersed, and the second solid electrolyte layer has a structure in which fibrous binders are entangled or connected to each other, and thus the strength may be improved without lowering the ionic conductivity of the solid electrolyte membrane. The solid electrolyte membrane may be substantially free of solvent.

Solid electrolyte membrane, method for manufacturing the same, and all-solid-state battery comprising the same

Solid electrolyte compositions and solid-state batteries are disclosed, which comprise a solid electrolyte layer including a sulfide-containing solid-state electrolyte material and a compound of Chemical Formula 1. The sulfide-containing solid-state electrolyte material includes but is not limited to LiPSCl ('LPSC'), an LPS-based glass or glass ceramic of formula xLiS·yPS, wherein x+y=1, or an argyrodite-based sulfide-based solid electrolyte or formula LiPSX, wherein X═Cl, Br, or I) or LiPSCl, where y is <1. In some aspects, the compound of Chemical Formula 1 is sodium 3-mercapto-1-propanesulfonate (3M1P).

Methods for improving critical current density in a sulfide-based all-solid-state lithium-ion battery

Solid electrolyte compositions and solid-state batteries are disclosed, which comprise a solid electrolyte layer including a sulfide-containing solid-state electrolyte material and a compound of Chemical Formula 1. The sulfide-containing solid-state electrolyte material includes but is not limited to LiPSCl ('LPSC'), an LPS-based glass or glass ceramic of formula xLiS·yPS, wherein x+y=1, or an argyrodite-based sulfide-based solid electrolyte or formula LiPSX, wherein X=Cl, Br, or I) or LiPSCl, where y is <1. In some aspects, the compound of Chemical Formula 1 is sodium 3-mercapto-1-propanesulfonate (3M1P).

Disclosed is a sulfide-containing solid electrolyte material with an organic coating, as well as densified pellets containing this solid electrolyte material, a solid electrolyte thereof, and a solid state battery containing the solid electrolyte. According to aspects of the disclosure, the coating comprising a compound of Chemical Formula (1) or Chemical Formula (2) is formed on the surface of a sulfide-containing solid electrolyte material, e.g., the organic coating may comprise a compound having a thiol with a long hydrophobic tail, such as 1-undecanethiol. The coating provides densification of sulfide-containing solid electrolyte materials, and facilitates the ionic and lithium atomic diffusion coefficient at sulfide grain boundaries during pressing, thus achieving the densification of sulfide solid state electrolyte.

Growing community of inventors

Daejeon, South Korea

Min-Sang Song