Interlayer sodium electrodes for sodium ion batteries

Patent metadata

Field	Value
Publication number	US-2019280326-A1
Application number	US-201916297385-A
Country	US
Kind code	A1
Filing date	Mar 8, 2019
Priority date	Mar 9, 2018
Publication date	Sep 12, 2019
Grant date	—

Abstract

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

First claim

1 . A sodium-ion battery, comprising:
an electrode having an active material; an interlayer comprising a passivation function; 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 4 , wherein the interlayer comprises the general formula Na 3 AX 4 .8H 2 O (A=P or Sb, X=S or Se).

6 . 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.

7 . 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.

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

9 . A battery comprising:
a sodium metal electrode; an interlayer comprising a passivation function; 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.

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

11 . The battery of claim 9 , wherein the solid electrolyte material has the general formula Na 3 AX 4 (A=P or Sb, X=S or Se).

12 . The battery of claim 11 , wherein the interlayer comprises the general formula Na 3 AX 4 .8H 2 O (A=P or Sb, X=S or Se).

13 . The battery of claim 9 , wherein the solid electrolyte is Na 3 SbS 4 and the interlayer is Na 3 SbS 4 .8H 2 O.

14 . The battery of claim 9 , 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.

15 . 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.

16 . The method of claim 15 , wherein in the cathode material is a carbon or graphite.

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

18 . 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

• H01M2300/0068

  inorganic · CPC title

• H01M4/62

  Selection of inactive substances as ingredients for active masses, e.g. binders, fillers · CPC title

• H01M4/366

  as layered products · CPC title

• H01M4/1395

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

• H01M4/587

  for inserting or intercalating light metals · CPC title