US 12,434,969 B2
Lithium nitride composition for sulfide-based inorganic solid electrolyte material
Tetsuya Matsubara, Tsukuba (JP); Tatsushi Yoshida, Tsukuba (JP); Motoshi Tamura, Tsukuba (JP); and Kazutomi Yamamoto, Tsukuba (JP)
Assigned to FURUKAWA CO., LTD., Tokyo (JP)
Appl. No. 17/598,586
Filed by FURUKAWA CO., LTD., Tokyo (JP)
PCT Filed Mar. 6, 2020, PCT No. PCT/JP2020/009706
§ 371(c)(1), (2) Date Sep. 27, 2021,
PCT Pub. No. WO2020/203046, PCT Pub. Date Oct. 8, 2020.
Claims priority of application No. 2019-066564 (JP), filed on Mar. 29, 2019.
Prior Publication US 2022/0081296 A1, Mar. 17, 2022
Int. Cl. H01M 10/0525 (2010.01); C01B 21/06 (2006.01); H01M 10/0562 (2010.01)
CPC C01B 21/061 (2013.01) [H01M 10/0525 (2013.01); H01M 10/0562 (2013.01); C01P 2002/72 (2013.01); H01M 2300/0068 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A method of manufacturing a lithium nitride composition for a sulfide-based inorganic solid electrolyte material, the method comprising:
a step of nitriding lithium foil in a nitrogen gas;
a step of mechanically processing the obtained lithium nitride foil such that the lithium nitride foil is powdery; and
a step of annealing the obtained powdery lithium nitride,
wherein the lithium nitride composition comprises α-lithium nitride
wherein in a spectrum obtained by X-ray diffraction in which a CuKα ray is used as a radiation source, when a diffraction intensity of a diffraction peak present at a position of a diffraction angle 2θ=23.0±0.3° is represented by Iα and a diffraction intensity of a diffraction peak present at a position of a diffraction angle 2θ=32.0±0.3° is represented by Iβ,
a value of Iβ/Iα is 4.50 or lower; and
wherein the temperature during the nitriding reaction of the lithium foil is in a range of 10° C. or higher and 120° C. or lower.