Interlayer sodium electrodes for sodium ion batteries

Patent metadata

Field	Value
Publication number	US-11018372-B2
Application number	US-201916297385-A
Country	US
Kind code	B2
Filing date	Mar 8, 2019
Priority date	Mar 9, 2018
Publication date	May 25, 2021
Grant date	May 25, 2021

Abstract

A sodium-ion battery includes an electrode and a passivation layer on the electrode material.

First claim

The invention claimed is:

1. A sodium-ion battery, comprising:
an electrode having an active material;
an interlayer comprising a passivation function and comprising a general formula Na 3 AX 4 ·8H 2 O, wherein A=P or Sb and wherein X=S or Se; and
a solid electrolyte medium in contact with a passivation layer.

2. The battery of claim 1 , wherein the interlayer inhibits an electron pathway between the solid electrolyte and the active material.

3. The battery of claim 1 , wherein the active material is a sodium metal material.

4. The battery of claim 1 , wherein the solid electrolyte material has the general formula Na 3 AX 4 (A=P or Sb, X=S or Se).

5. The battery of claim 1 , wherein the solid electrolyte is Na 3 SbS 4 and the interlayer is Na 3 SbS 4 ·8H 2 O.

6. The battery of claim 1 , wherein the solid electrolyte and interlayer are selected from:
(i) Na 3 PS 4 and Na 3 PS 4 ·8H 2 O;
(ii) Na 3 PSe 4 and Na 3 PSe 4 ·8H 2 O; and
(iii) Na 3 SbSe 4 and Na 3 SbSe 4 ·8H 2 O.

7. The battery of claim 1 , wherein the electrode is a positive electrode or a cathode.

8. A battery comprising:
a sodium metal electrode;
an interlayer comprising a passivation function and comprising a general formula Na 3 AX 4 ·8H 2 O, wherein A=P or Sb and wherein X=S or Se; and
a solid electrolyte medium in contact with a passivation layer and wherein the interlayer is between the solid electrolyte medium and the sodium metal electrode.

9. The battery of claim 8 , wherein the interlayer inhibits an electron pathway between the solid electrolyte and the sodium metal electrode.

10. The battery of claim 8 , wherein the solid electrolyte material has the general formula Na 3 AX 4 (A=P or Sb, X=S or Se).

11. The battery of claim 8 , wherein the solid electrolyte is Na 3 SbS 4 and the interlayer is Na 3 SbS 4 ·8H 2 O.

12. The battery of claim 8 , wherein the solid electrolyte and interlayer are selected from:
(i) Na 3 PS 4 and Na 3 PS 4 ·8H 2 O;
(ii) Na 3 PSe 4 and Na 3 PSe 4 ·8H 2 O; and
(iii) Na 3 SbSe 4 and Na 3 SbSe 4 ·8H 2 O.

13. A method of making a battery of claim 1 , comprising
preparing a solid electrolyte material;
exposing the solid electrolyte material to an environment under conditions to obtain a passivation layer on the solid electrolyte material;
placing/layering an anode Na metal electrode material in contact with the passivation layer;
placing/layering a cathode electrode material in contact with the passivation layer; and
placing a current collector on each of the cathode electrode material and the anode Na metal electrode material.

14. The method of claim 13 , wherein in the cathode material is a carbon or graphite.

15. The method of claim 13 , wherein the current collector material is Cu, Al, or steel.

16. A system, comprising:
a sodium-ion battery of claim 1 ; and
electronics for controlling the discharge of the battery.

Assignees

• Univ California

Inventors

• Ceder Gerbrand
• Tian Yaosen
• Sun Yingzhi
• Hannah Daniel C
• Bo Shou-Hang

Classifications

• Y02P70/50

  Manufacturing or production processes characterised by the final manufactured product · CPC title

• H01M4/1395

  of electrodes based on metals, Si or alloys · CPC title

• H01M2004/028

  Positive electrodes · CPC title

• H01M4/583

  Carbonaceous material, e.g. graphite-intercalation compounds or CFx · CPC title

• H01M4/381

  Alkaline or alkaline earth metals elements (H01M4/40 takes precedence) · CPC title