Solid electrolyte compositions for electrochemical cells

Patent metadata

Field	Value
Publication number	US-10777845-B2
Application number	US-201715820107-A
Country	US
Kind code	B2
Filing date	Nov 21, 2017
Priority date	Nov 23, 2016
Publication date	Sep 15, 2020
Grant date	Sep 15, 2020

Abstract

A solid-state electrolyte including an ion-conducting inorganic material represented by the formula Li1+yZr2−xMex(PO4)3 where 2>x>0, 0.2>y>−0.2, and Me is at least one element from Group 14, Group 6, Group 5, or combinations thereof.

First claim

We claim:

1. A lithium ion battery, comprising:
a lithium-based anode;
a cathode comprising an active material; and
a solid-state electrolyte comprising a polymer binder and an ion-conducting inorganic material represented by the formula:
Li 1+y Zr 2−x Me x (PO 4 ) 3

where 2>x>0, 0.2>y>−0.2, and Me is tin (Sn), niobium (Nb), or combinations thereof, and a concentration of the ion-conducting inorganic material is no less than 61% by weight and no greater than 84% by weight relative to a total weight of the solid-state electrolyte.

2. The lithium ion battery of claim 1 , wherein Me is tin (Sn).

3. The lithium ion battery of claim 1 , wherein Me is niobium (Nb).

4. The lithium ion battery of claim 1 wherein the polymer binder comprises PVdF.

5. The lithium ion battery of claim 1 , wherein the solid-state electrolyte further comprises a lithium salt.

6. The lithium ion battery of claim 5 , wherein the lithium salt is selected from the group consisting of lithium bis(trifluoromethanesulfonyl)imide (CF 3 SO 2 NLiSO 2 CF 3 ), lithium tetrafluoroborate (LiBF 4 ), lithium hexafluoroarsenate (LiAsF 6 ), lithium bis(oxalato)borate (LiB(C 2 O 4 ) 2 ), lithium chlorate (LiClO 4 ), lithium hexafluorophosphate (LiPF 6 ), lithium triflate (LiCF 3 SO 3 ), lithium bis(fluorosulfonyl)imide (LiFSi), or combinations thereof.

7. The lithium ion battery of claim 5 wherein the lithium salt comprises lithium bis(trifluoromethanesulfonyl)imide (CF 3 SO 2 NLiSO 2 CF 3 ).

8. The lithium ion battery of claim 1 , wherein Me is the combination of niobium (Nb) and tin (Sn).

9. The lithium ion battery of claim 1 , wherein the solid-state electrolyte lacks a solvent.

10. A lithium ion battery, comprising:
a lithium-based anode;
a cathode comprising an active material; and
a solid-state electrolyte comprising an ion-conducting inorganic material represented by the formula:
Li 1+y Zr 2−x Me x (PO 4 ) 3

where 2>x>0, 0.2>y>−0.2, and Me is tin (Sn) or a combination of niobium (Nb) and tin (Sn), and wherein the solid-state electrolyte lacks a solvent.

11. The lithium ion battery of claim 10 , wherein the solid-state electrolyte further comprises a polymer binder.

12. The lithium ion battery of claim 11 , wherein the polymer binder comprises PVdF.

13. The lithium ion battery of claim 10 , wherein the solid-state electrolyte further comprises a lithium salt.

14. The lithium ion battery of claim 13 , wherein the lithium salt is selected from the group consisting of lithium bis(trifluoromethanesulfonyl)imide (CF 3 SO 2 NLiSO 2 CF 3 ), lithium tetrafluoroborate (LiBF 4 ), lithium hexafluoroarsenate (LiAsF 6 ), lithium bis(oxalato)borate (LiB(C 2 O 4 ) 2 ), lithium chlorate (LiClO 4 ), lithium hexafluorophosphate (LiPF 6 ), lithium triflate (LiCF 3 SO 3 ), lithium bis(fluorosulfonyl)imide (LiFSi), or combinations thereof.

15. The lithium ion battery of claim 13 , wherein the lithium salt comprises lithium bis(trifluoromethanesulfonyl)imide (CF 3 SO 2 NLiSO 2 CF 3 ).

16. The lithium ion battery of claim 10 , wherein Me is the combination of niobium (Nb) and tin (Sn).

17. The lithium ion battery of claim 10 , wherein a concentration of the ion-conducting inorganic material is no less than 61% by weight and no greater than 84% by weight relative to a total weight of the solid-state electrolyte.

18. A lithium ion battery, comprising:
a lithium-based anode;
a cathode comprising an active material; and
a solid-state electrolyte comprising an ion-conducting inorganic material represented by the formula:
Li 1+y Zr 2−x Me x (PO 4 ) 3

where 2>x>0, 0.2>y>−0.2, and Me is a combination of niobium (Nb) and tin (Sn).

Assignees

• Wildcat discovery technologies inc

Inventors

• O'Neill Cory
• Li Bin
• Freigang Alex

Classifications

• H01M4/623

  fluorinated polymers · CPC title

• H01M10/0525

  Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title

• H01M10/056 Primary

  characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes · CPC title

• Y02E60/10

  Energy storage using batteries · CPC title

• C01B25/45

  containing plural metal, or metal and ammonium · CPC title