Na—FeCl2 ZEBRA type battery

Patent metadata

Field	Value
Publication number	US-10615407-B2
Application number	US-201414460266-A
Country	US
Kind code	B2
Filing date	Aug 14, 2014
Priority date	Aug 14, 2014
Publication date	Apr 7, 2020
Grant date	Apr 7, 2020

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. A method comprising assembling a Na/FeCl 2 battery in a discharge state, the method including:
simultaneously mixing together (i) Fe powder, (ii) elemental sulfur and Na 2 S, and (iii) NaCl, wherein (ii) is present in an amount of less than 10 mol percent S, based on the total moles of (i), (ii) and (iii), and wherein prior to mixing with the elemental sulfur, Na 2 S and NaCl, the Fe powder comprises particles having a passivation layer, and mixing the Fe powder with the elemental sulfur, Na 2 S and NaCl removes at least a portion of the passivation layer;
forming the resulting mixture into a cathode, wherein the cathode does not include Ni;
introducing a catholyte into the cathode; and
coupling anode and electrolyte components with the cathode to form the Na/FeCl 2 battery.

2. The method of claim 1 , wherein the mixing is performed at room temperature.

3. The method of claim 1 , wherein the Fe source (i) to NaCl(iii) has a mol % ratio of 0.5:1 to 2:1.

4. The method of claim 3 , wherein the Fe powder particles have an average particle size of less than 10 μm.

5. The method of claim 1 , wherein the of Na 2 S/S has a mol % ratio of 1:1 to 1:7.

6. A method comprising assembling an electrochemical cell a Na/FeCl 2 battery in a discharge state, the method including:
simultaneously mixing together (i) Fe powder, (ii) Na 2 S 3 , and (iii) NaCl, wherein (ii) is present in an amount of less than 10 mol percent S, based on the total moles of (i), (ii) and (iii), and wherein prior to mixing with the Na 2 S 3 and NaCl, the Fe powder comprises particles having a passivation layer, and mixing the Fe powder with the Na 2 S 3 and NaCl removes at least a portion of the passivation layer;
forming the resulting mixture into a cathode, wherein the cathode does not include Ni;
introducing a catholyte into the cathode; and
coupling anode and electrolyte components with the cathode to form the Na/FeCl 2 battery.

Assignees

• Battelle Memorial Institute

Inventors

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

Classifications

• H01M4/38 Primary

  of elements or alloys · CPC title

• H01M4/582

  Halogenides · CPC title

• H01M4/62

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

• H01M10/399

  Cells with molten salts · CPC title