Patent ID: 11955601
Assignee: INDUSTRY-ACADEMIA COOPERATION GROUP OF SEJONG UNIVERSITY
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  C  Y | IPC C  H

Claim 0:
1. A sulfide solid electrolyte for all-solid secondary batteries, the sulfide solid electrolyte being a compound represented by Formula 1 below,

LiaP1SbXc  Formula 1

in Formula 1,
X may be fluorine (F), chlorine (Cl), bromine (Br), or iodine (I), and
4.7<a<5.3, 4.4≤b≤4.5, and 0.7<c<1.5,
wherein:
the sulfide solid electrolyte has an argyrodite-type crystal structure,
a ratio (I(29.0)/I(30.0) ratio) of a peak intensity at a 2θ of 29±0.1° to a peak intensity at a 2θ of 30±0.1° is 0.06 or less, the peak intensities being obtained by X-ray diffraction analysis of the sulfide solid electrolyte, and
a ratio (I(27.1)/I(30.0) ratio) of a peak intensity at a 2θ of 27.1±0.1° to a peak intensity at a 2θ of 30±0.1° is 0.06 or less, the peak intensities being obtained by X-ray diffraction analysis of the sulfide solid electrolyte.