Process of preparing a chemically pre-formed (cpf) iron negative electrode with oxidizing compounds
US-2015060740-A1 · Mar 5, 2015 · US
Process of preparing a chemically pre-formed (CPF) iron negative electrode with oxidizing gases
US9732409B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9732409-B2 |
| Application number | US-201414478990-A |
| Country | US |
| Kind code | B2 |
| Filing date | Sep 5, 2014 |
| Priority date | Sep 5, 2013 |
| Publication date | Aug 15, 2017 |
| Grant date | Aug 15, 2017 |
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- Title
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- Abstract
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Abstract
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Provided is a process for preparing an electrode comprising an iron active material. The process comprises first fabricating an electrode comprising an iron active material, and then treating the electrode with a gaseous oxidant to thereby create an oxidized surface. The resulting iron electrode is preconditioned prior to any charge-discharge cycle to have the assessable surface of the iron active material in the same oxidation state as in discharged iron negative electrodes active material.
First claim
Opening claim text (preview).
What is claimed is: 1. A process for preparing an electrode comprising an iron active material, which comprises: i) fabricating an electrode comprising an iron active material, and ii) treating the electrode with a gaseous oxidant to thereby create an oxidized surface prior to any charge-discharge cycle. 2. The process of claim 1 , therein the oxidant comprises ozone, chlorine, or nitrous oxide. 3. The process of claim 2 , wherein the oxidant comprises ozone. 4. The process of claim 1 , wherein the electrode surface has been treated with a gaseous oxidant prior to any charge-discharge cycle to have the accessible surface of the iron material in the same oxidation state as discharged iron negative electrode active material. 5. The process of claim 4 , wherein the oxidation state of the oxidized iron active material is +2, +2/+3, +3 or +4. 6. The process of claim 1 , wherein the electrode further comprises a binder. 7. The process of claim 1 , wherein the electrode further comprises sulfur. 8. The process of claim 1 , wherein the electrode further comprises a conductive additive. 9. The process of claim 8 , wherein the conductive additive comprises nickel, or copper or carbon black. 10. The process of claim 1 , wherein the electrode comprises an iron active material comprising about: 50-90 wt % iron powder 5-30 wt % nickel powder 0.5-5.0 w % binder, and 0.25-2.0 w % sulfur. 11. The process of claim 1 , wherein the electrode comprise a single layer of conductive substrate coated on at least one side with a coating comprising the iron active material. 12. The process of claim 11 , wherein the substrate is comprised of nickel plated steel. 13. The process of claim 1 , wherein the porosity of the electrode is in the range of about 15-50%. 14. The process of claim 1 , wherein the electrode surface is treated with the gaseous oxidant by exposing the surface of the electrode to the gaseous oxidant in a closed environment.
Assignees
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Classifications
Physical characteristics, e.g. porosity, surface area · CPC title
in the form of layers, e.g. coatings · CPC title
Metal or alloys, e.g. alloy coatings (H01M4/669 take precedence) · CPC title
Electric conductive fillers · CPC title
Binders · CPC title
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Frequently asked questions
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- What does patent US9732409B2 cover?
- Provided is a process for preparing an electrode comprising an iron active material. The process comprises first fabricating an electrode comprising an iron active material, and then treating the electrode with a gaseous oxidant to thereby create an oxidized surface. The resulting iron electrode is preconditioned prior to any charge-discharge cycle to have the assessable surface of the iron act…
- Who is the assignee on this patent?
- Encell Technology Inc
- What technology area does this patent fall under?
- Primary CPC classification H01M4/049. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Aug 15 2017 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 4 related publications on this page (citations in our corpus or others sharing the same primary CPC).