Solid electrolyte battery

Patent metadata

Field	Value
Publication number	US-2019326628-A1
Application number	US-201916388945-A
Country	US
Kind code	A1
Filing date	Apr 19, 2019
Priority date	Apr 20, 2018
Publication date	Oct 24, 2019
Grant date	—

Abstract

There is provided a solid electrolyte including at least one layer with no nitrogen and which includes LixPOySz, with 0<z≤3, 2.1≤x≤2.4, and 1≤y≤4. A battery including the electrolyte, and a method for producing the electrolyte, are also provided.

First claim

1 .- 14 . (canceled)

15 . A solid electrolyte, comprising:
at least one layer with no nitrogen and which comprises Li x PO y S z , with 0<z≤3, 2.1≤x≤2.4, and 1≤y≤4.

16 . The solid electrolyte according to claim 15 , wherein the at least one layer consists of Li x PO y S z , with 0<z≤3.

17 . The solid electrolyte according to claim 15 , wherein z≤2.

18 . The solid electrolyte according to claim 15 , wherein 3.7≤y+z≤4.1.

19 . The solid electrolyte according to claim 18 , wherein y+z=4.

20 . The solid electrolyte according to claim 15 , further comprising at least one buffer layer on at least one face of the at least one layer comprising Li x PO y S z .

21 . The solid electrolyte according to claim 20 , wherein the at least one buffer layer comprises LiPON.

22 . The solid electrolyte according to claim 20 , further comprising a buffer layer on each face of the at least one layer comprising Li x PO y S z .

23 . A battery, comprising an electrolyte according to claim 15 .

24 . The battery according to claim 23 , further comprising, stacked on a face of a substrate:
a first current collector; a first electrode; the electrolyte; a second electrode; and a second current collector and one or more encapsulation layers.

25 . A method for producing an electrolyte according to claim 15 , comprising a step of physical vapour deposition of an electrolyte layer from a Li 3 PO 4 target sputtered under an atmosphere comprising at least one sulphur gas, so as to obtain a layer comprising Li x PO y S z .

26 . The method according to claim 25 , wherein the at least one sulphur gas is H 2 S.

27 . The method according to claim 26 , wherein a ratio of the at least one sulphur gas in the atmosphere is between 0.5% and 15%.

28 . The method according to claim 26 , wherein a ratio of the at least one sulphur gas in the atmosphere is less than or equal to 10%.

29 . The method according to claim 26 , wherein a ratio of the at least one sulphur gas in the atmosphere is 5%.

30 . The method according to claim 25 , wherein the atmosphere includes no nitrogen.

31 . A Li x PO y S z layer with no nitrogen, with 0<z≤3, for producing a solid electrolyte.

Assignees

• Commissariat Energie Atomique
• Inst Polytechnique Grenoble

Inventors

• Morin Pierrick
• Benayad Anass
• Bouchet Renaud
• Le Van-Jodin Lucie

Classifications

• H01M10/0562 Primary

  Solid materials · CPC title

• H01M2300/0068

  inorganic · CPC title

• C23C14/0057

  using reactive gases other than O2, H2O, N2, NH3 or CH4 · CPC title

• H01M10/052

  Li-accumulators · CPC title

• C01B25/16

  Oxyacids of phosphorus; Salts thereof (peroxyacids or salts thereof C01B15/00) · CPC title