Iron-bearing electrodes for electrochemical cells

Patent metadata

Field	Value
Publication number	US-2021359291-A1
Application number	US-202117313892-A
Country	US
Kind code	A1
Filing date	May 6, 2021
Priority date	May 7, 2020
Publication date	Nov 18, 2021
Grant date	—

Abstract

Materials, designs, and methods of fabrication for electrodes for electrochemical cells are disclosed. In various embodiments, the electrode comprises iron. Various embodiments may include materials, systems, and methods for the use of various iron-bearing materials, starting from the discharged or partially discharged state in an alkaline electrochemical cell, such as an Fe—Ni, Fe—MnO2, or Fe-air battery. Various embodiments may include a battery comprising an electrode comprising iron. In various embodiments, the iron may be in various forms, such as iron ore, iron concentrate, iron pellets, BF grade pellets, DR grade pellets, hematite, magnetite, wustite, martite, goethite, limonite, siderite, pyrite, ilmenite, spinel manganese ferrite, etc. In various embodiments, the iron may include impurity phases, such as SiO2, CaO, etc.

First claim

1 . A battery, comprising:
a first electrode; an electrolyte; and a second electrode, wherein one or both of the first electrode and the second electrode comprises iron.

2 . The battery of claim 1 wherein the iron is in the form of iron ore.

3 . The battery of claim 1 wherein the iron is in the form of concentrate.

4 . The battery of claim 1 wherein the iron is in the form of at least one form selected from the group consisting of pellets, BF grade pellets, DR grade pellets, hematite, magnetite, wustite, martite, goethite, limonite, siderite, pyrite, ilmenite, and spinel manganese ferrite.

5 . The battery of claim 2 , the iron further comprising at least 0.1% SiO 2 by mass.

6 . The battery of claim 2 , the iron further comprising at least 0.25% SiO 2 by mass.

7 . The battery of claim 2 , the iron further comprising at least 0.5% SiO 2 by mass.

8 . The battery of claim 2 , the iron further comprising at least 0.1% CaO by mass.

9 . The battery of claim 2 , the iron further comprising at least 0.25% CaO by mass.

10 . The battery of claim 2 , the iron further comprising at least 0.5% CaO by mass.

11 . (canceled)

12 . (canceled)

13 . The battery of claim 3 , the iron further comprising at least 0.1% SiO 2 by mass.

14 . The battery of claim 3 , the iron further comprising at least 0.25% SiO 2 by mass.

15 . The battery of claim 3 , the iron further comprising at least 0.5% SiO 2 by mass.

16 . The battery of claim 3 , the iron further comprising at least 0.1% CaO by mass.

17 . The battery of claim 3 , the iron further comprising at least 0.25% CaO by mass.

18 . The battery of claim 3 , the iron further comprising at least 0.5% CaO by mass.

19 . The battery of claim 4 , the iron further comprising at least 0.1% SiO 2 by mass.

20 . The battery of claim 4 , the iron further comprising at least 0.5% SiO 2 by mass.

21 . The battery of claim 4 , the iron further comprising at least 0.1% CaO by mass.

22 . The battery of claim 4 , the iron further comprising at least 0.5% CaO by mass.

Assignees

• Form Energy Inc

Inventors

• Gibson Michael Andrew
• Chiang Yet-Ming
• Woodford William Henry

Classifications

• H01M2004/027

  Negative electrodes · CPC title

• H01M4/13

  Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof · CPC title

• H01M4/521 Primary

  of iron for aqueous cells · CPC title

• H01M4/06

  Electrodes for primary cells · CPC title

• Y02E60/10

  Energy storage using batteries · CPC title