Method for producing solid electrolyte and electrode for all-solid state batteries

Patent metadata

Field	Value
Publication number	US-2020185699-A1
Application number	US-201716635400-A
Country	US
Kind code	A1
Filing date	Aug 4, 2017
Priority date	Aug 4, 2017
Publication date	Jun 11, 2020
Grant date	—

Abstract

A method (100) for producing a sintered component being a solid electrolyte and/or an electrode including sulfur for an all-solid state battery, the method including mixing powders (102) so as to obtain a powder mixture, at least one of the powders comprising sulfur, pressing (106) a component with the powder mixture and sintering (108) the component under a partial pressure of sulfur comprised between 150 Pa and 0.2 MPa so as to obtain a sintered component comprising sulfur, the sintered component exhibiting the peaks in positions of 2θ=15.08° (±0.50°), 15.28° (±0.50°), 15.92° (±0.50°), 17.5° (±0.50°), 18.24° (±0.50°), 20.30° (±0.50°, 23.44° (±0.50°), 24.48° (±0.50°), and 26.66° (±0.50°) in a X-ray diffraction measurement using CuKα line.

First claim

1 . A method for producing a sintered component being a solid electrolyte and/or an electrode comprising sulfur for an all-solid state battery, the method comprising:
mixing powders so as to obtain a powder mixture, at least one of the powders comprising sulfur; pressing a component with the powder mixture; and sintering the component under a partial pressure of sulfur comprised between 200 Pa and 0.2 MPa so as to obtain a sintered component comprising sulfur; wherein the sintered component exhibits the peaks in positions of 2θ=15.08° (±0.50°), 15.28° (±0.50°), 15.92° (±0.50°), 17.5° (±0.50°), 18.24° (±0.50°), 20.30° (±0.50°), 23.44° (±0.50°), 24.48° (±0.50°), and 26.66° (±0.50°) in a X-ray diffraction measurement using CuKα line.

2 . The method according to claim 1 , wherein the sintered component comprises XTi 2 (PS 4 ) 3 and/or XZr 2 (PS 4 ) 3, X being lithium (Li), sodium (Na) or silver (Ag).

3 . The method according to claim 1 , wherein the partial pressure of sulfur is obtained by evaporating solid sulfur.

4 . The method according to claim 3 , wherein the component is placed in a container and sealed under Argon at a pressure equal to or smaller than 100 Pa, preferably equal to or smaller than 50 Pa.

5 . The method according to claim 1 , wherein the partial pressure of sulfur is obtained from a sulfur containing gas.

6 . The method according to claim 1 , the method comprising a step of amorphasizing the powder mixture so as to obtain an amorphasized powder mixture.

7 . The method according to claim 6 , wherein sintering comprises a sintering plateau temperature equal to or smaller than 500° C.

8 . The method according to claim 6 , wherein sintering comprises a sintering plateau time equal to or smaller than 20 hours.

9 . The method according to claim 1 , wherein sintering is a two-step sintering, a first sintering step under a partial pressure of sulfur comprised between 200 Pa and 0.2 MPa so as to obtain an intermediate product, the intermediate product being grinded so as to obtain a sintered powder, the sintered powder being pressed and sintered during a second sintering step under a partial pressure of sulfur comprised between 200 Pa and 0.2 MPa.

10 . The method according to claim 1 , wherein the component is pressed at a pressure equal to or greater than 25 MPa and equal to or smaller than 500 MPa.

Assignees

• Toyota Motor Europe

Inventors

• Katoh Yuki
• Hautier Geoffroy
• Miglio Anna

Classifications

• Y02E60/10

  Energy storage using batteries · CPC title

• H01M4/1397

  of electrodes based on inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy · CPC title

• C01B17/20

  Methods for preparing sulfides or polysulfides, in general (ammonium sulfides or polysulfides C01C; sulfides or polysulfides of metals, other than alkali metals, magnesium, calcium, strontium and barium, see the relevant groups of subclasses C01F or C01G, according to the metal) · CPC title

• C04B2235/3232

  Titanium oxides or titanates, e.g. rutile or anatase · CPC title

• H01M2300/0068

  inorganic · CPC title