公开(公告)号：US20190074541A1

公开(公告)日：2019-03-07

申请号：US16083597

申请日：2017-03-10

Applicant: Tokyo Institute of Technology

Inventor： Ryoji Kanno ,  Masaaki HIRAYAMA ,  Kota SUZUKI ,  Yulong SUN

IPC: H01M10/0562 ,  H01M10/0525 ,  C04B35/547 ,  C04B35/626 ,  C04B35/64

Abstract: To provide a sulfide solid electrolyte material which does not include Ge and which has excellent electrochemical stability and high lithium ion conductivity.A sulfide solid electrolyte, including a sulfide-based solid electrolyte represented by the composition formula: Li4-4z-x[SnySi1-y]1+z-xPxS4 (where 0.5≤x≤0.6, y=0.2, and 0≥z≥−0.2), wherein the sulfide solid electrolyte has a peak at position 2θ=29.58°±0.50° in X-ray diffraction measurement using CuKα radiation and does not have a peak at position 2θ=27.33°±0.50° in X-ray diffraction measurement using CuKα radiation, or when the sulfide solid electrolyte has a peak at the position 2θ=27.33°±0.50°, the value of IB/IA is less than 0.50 (where IA is the diffraction intensity of the 2θ=29.58°±0.50° peak and IB is the diffraction intensity of the 2θ=27.33°±0.50° peak).

公开(公告)号：US20190237801A1

公开(公告)日：2019-08-01

申请号：US16327804

申请日：2017-08-23

Applicant: Tokyo Institute of Technology

Inventor： Ryoji KANNO ,  Masaaki HIRAYAMA ,  Kota SUZUKI ,  Yulong SUN ,  Satoshi HORI

IPC: H01M10/0562 ,  C01G19/00 ,  C01B33/00

CPC classification number: H01M10/0562 ,  C01B33/00 ,  C01G19/006 ,  C01P2002/50 ,  C01P2002/72 ,  C01P2006/40 ,  C04B35/547 ,  H01B1/06 ,  H01M6/18 ,  H01M10/0525 ,  H01M2300/0068

Abstract: Provided is a sulfide solid electrolyte material which has a composition that does not contain Ge, while having a smaller Li content than conventional sulfide solid electrolyte materials, and which has both lithium ion conductivity and chemical stability at the same time. A sulfide solid electrolyte which has a crystal structure represented by composition formula (Li3.45+β−4αSnα)(Si0.36Sn0.09)(P0.55−βSiβ)S4 (wherein α≤0.67, β≤0.33 and 0.43