Ionically conductive compounds and related uses

• US 10,122,043 B2
• Filed: 03/08/2018
• Issued: 11/06/2018
• Est. Priority Date: 11/24/2015
• Status: Active Grant

• Current Assignee: BASF SE, Sion Power Corporation
• Original Assignee: BASF SE, Sion Power Corporation
• Inventors: Du, Hui, Kelley, Tracy Earl, Scordilis-Kelley, Chariclea, Schneider, Holger, Leitner, Klaus, Kulisch, Joern, Safont-Sempere, Marina, ter Maat, Johan
• Primary Examiner(s): Slifka, Sarah A.
• Application Number:
  US15/915,309
• Publication Number:
  US 20180198162A1
• Time in Patent Office: 243 Days
• Field of Search: None
• CPC Class Codes: H01M 10/0525 Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
• CPC Class Codes: H01M 10/0562 Solid materials
• CPC Class Codes: H01M 2220/30 Batteries in portable systems, e.g. mobile phone, laptop
• CPC Class Codes: H01M 2300/0068 inorganic
• CPC Class Codes: H01M 50/434 Ceramics
• CPC Class Codes: H01M 50/46 Separators, membranes or diaphragms characterised by their combination with electrodes
• CPC Class Codes: H01M 50/497 Ionic conductivity
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

Abstract

Articles, compositions, and methods involving ionically conductive compounds are provided. The disclosed ionically conductive compounds may be incorporated into an electrochemical cell (e.g., a lithium-sulfur electrochemical cell, a lithium-ion electrochemical cell, an intercalated-cathode based electrochemical cell) as, for example, a protective layer for an electrode, a solid electrolyte layer, and/or any other appropriate component within the electrochemical cell. In certain embodiments, electrode structures and/or methods for making electrode structures including a layer comprising an ionically conductive compound described herein are provided.

Claims

1. A compound of formula (I):

Li_2xS_x+w+5zM_yP_2z 

 

(I)

wherein;

M is selected from the group consisting of Lanthanides, Group 3, Group 4, Group 5, Group 6, Group 7, Group 8, Group 9, Group 12, Group 13, and Group 14 atoms, and combinations thereof,

x is 8-16,

y is 0.1-1.5 or 3.5-6,

w is 0.1-15, and

z is 0.1-3.

3. A compound as in claim 1, wherein x is 10 or greater.

4. A compound as in claim 1, wherein x is 10-14.

5. A compound as in claim 1, wherein z is 1.

6. A compound as in claim 1, wherein M is selected from the group consisting of silicon, tin, germanium, zinc, iron, zirconium, aluminum, and combinations thereof.

7. A compound as in claim 1, wherein the compound of formula (I) has a cubic structure.

8. A compound as in claim 1, wherein the compound of formula (I) is selected from the group consisting of Li16MS15SiP2, Li20S17SiP2, Li21S17.5Si92, Li22S18SiP2, Li24S19SiP2, Li28S21SiP2, Li24S19GeP2, Li21SiP2S17.5, Li21AIP2S17, Li17AIP2S15, Li21BP2S17, and Li21GaP2S17.

2. A compound of formula (I):

Li_2xS_x+w+5zM_yP_2z 

 

(I)

wherein;

M is selected from the group consisting of Lanthanides, Group 3, Group 4, Group 5, Group 6, Group 7, Group 8, Group 9, Group 12, Group 13, and Group 14 atoms, and combinations thereof,

x is 8-16,

y is 0.1-6,

w is y or 1.5y, and

z is 0.1-3.

9. An article for use in an electrochemical cell, comprising:

a compound of formula (I);

Li2xSx+w+5zMyP2z 

 

(I)

wherein;

M is selected from the group consisting of Lanthanides, Group 3, Group 4, Group 5, Group 6, Group 7, Group 8, Group 9, Group 12, Group 13, and Group 14 atoms, and combinations thereof;

x is 8-16,

y is 0.1-1.5 or 3.5-6,

w is 0.1-15, and

z is 0.1-3.

10. An article as in claim 9, comprising a layer comprising the compound of formula (I).

11. An article as in claim 9, comprising the compound of formula (I) deposited on a layer.

12. An article as in claim 9, comprising a plurality of particles that comprise the compound of formula (I).

13. An article as in claim 9, comprising a layer comprising a plurality of particles that comprise the compound of formula (I).

14. An article as in claim 12, wherein the plurality of particles have an average largest cross-sectional dimension of greater than or equal to 10 nm and less than or equal to 100 microns.

15. An article as in claim 12, wherein the plurality of particles have an average ion conductivity of greater than or equal to 10⁻

4 S/cm.

16. An article as in claim 10, wherein the layer comprising the compound of formula (I) is in direct contact with an electrode.

17. An article as in claim 10, wherein the layer comprising the compound of formula (I) has an average ion conductivity of greater than or equal to 10⁻

4 S/cm.

18. An article as in claim 10, wherein at least a portion of the layer comprising the compound of formula (I) is crystalline.

19. An article as in claim 18, wherein the layer comprising the compound of formula (I) is greater than or equal to 50 wt. % and less than or equal to 99 wt. % crystalline.

20. An article as in claim 9, wherein the compound is selected from the group consisting of Li₁₆S₁₅SiP₂, Li₂₀S₁₇SiP₂, Li₂₁S₁₇Si₂P, Li₂₁S_17.5SiP₂, Li₂₂S₁₈SiP₂, Li₂₄S₁₉SiP₂, Li₂₈S₂₁SiP₂, Li₂₄S₁₉GeP₂, Li₂₁SiP₂S_17.5, Li₂₁AlP₂S₁₇, Li₁₇AlP₂S₁₅, Li₂₁BP₂S₁₇, and Li₂₁GaP₂S₁₇.