Na-fecl2 zebra type battery

Patent metadata

Field	Value
Publication number	US-2016049641-A1
Application number	US-201414460266-A
Country	US
Kind code	A1
Filing date	Aug 14, 2014
Priority date	Aug 14, 2014
Publication date	Feb 18, 2016
Grant date	—

Abstract

An energy storage device comprising a cathode comprising:
(i) an Fe source; (ii) at least one sulfur species and (iii) NaCl,

wherein the mol percent of S is less than 10, based on the total moles of (i), (ii) and (iii).

First claim

What is claimed is:

1 . An energy storage device comprising a cathode comprising:
(i) an Fe source; (ii) at least one sulfur species and (iii) NaCl,
wherein the mol percent of S is less than 10, based on the total moles of (i), (ii) and (iii).

2 . The device of claim 1 , wherein the mol ratio of (ii) to (iii) is less than 1:6.

3 . The device of claim 1 , wherein the Fe source is Fe powder.

4 . The device of claim 1 , wherein the at least one sulfur species (ii) is (a) elemental sulfur and a sulfur agent or (b) a polysulfide;

5 . The device of claim 4 , wherein the sulfur agent is selected from Na 2 S, CuS, Li 2 S, FeS, K 2 S, ZnS, or any and all combinations thereof.

6 . The device of claim 4 , wherein the polysulfide is an alkali metal polysulfide having a formula of A 2-x S y , wherein A is selected from Li, Na, K, Rb, or Cs; 0≦x≦2; 2≦y≦8.

7 . The device of claim 1 , wherein the cathode does not include any Ni.

8 . The device of claim 1 , wherein the cathode does not include any Zn.

9 . The device of claim 1 , further comprising an anode comprising metallic sodium, and a beta-alumina solid electrolyte separating the anode and the cathode.

10 . The device of claim 9 wherein the catholyte comprises NaAlCl 4 .

11 . A battery comprising a plurality of the energy storage devices of claim 1 .

12 . A method comprising assembling an electrochemical cell in a discharge state, the method including:
mixing together (i) an Fe source, (ii) (a) elemental sulfur and a sulfur agent or (ii) (b) polysulfide, and (iii) NaCl; forming the resulting mixture into a cathode for an electrochemical cell; introducing a catholyte into the cathode; and coupling anode and electrolyte components with the cathode.

13 . The method of claim 12 , wherein the mixing is performed at room temperature.

14 . The method of claim 12 , wherein less than 10 mol % S is present in the mixture, based on the total moles of (i), (ii) and (iii).

15 . The method of claim 12 , wherein the mol % ratio of the Fe source (i) to NaCl(iii) is 0.5:1 to 2:1.

16 . The method of claim 12 , wherein the Fe source is Fe powder.

17 . The method of claim 12 , wherein the sulfur agent is selected from Na 2 S, CuS, Li 2 S, FeS, K 2 S, ZnS, or any and all combinations thereof.

18 . The method of claim 12 , wherein the polysulfide is an alkali metal polysulfide having a formula of A 2-x S y , wherein A is selected from Li, Na, K, Rb, or Cs; 0≦x≦2; 2≦y≦8.

19 . The method of claim 12 , comprising mixing (i) an Fe source, (ii) (a) elemental sulfur and a sulfur agent, and (iii) NaCl.

20 . The method of claim 19 , wherein the sulfur agent is Na 2 S.

21 . The method of claim 12 , comprising mixing together (i) an Fe source, (ii) (b) a polysulfide, and (iii) NaCl.

22 . A method comprising forming a cathode composition from (i) an Fe source, (ii) (a) elemental sulfur and a sulfur agent or (b) a polysulfide, and (iii) NaCl, wherein the mol percent of S is less 10, based on the total moles of (i), (ii) and (iii).

Assignees

• Battelle Memorial Institute

Inventors

• Li Guosheng
• Kim Jin Yong
• Lu Xiaochuan
• Meinhardt Kerry D
• Sprenkle Vincent L

Classifications

• H01M4/62

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

• H01M4/381

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

• H01M4/136 Primary

  Electrodes based on inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy · CPC title

• H01M4/134

  Electrodes based on metals, Si or alloys · CPC title

• H01M4/582

  Halogenides · CPC title