Process of preparing a chemically pre-formed (cpf) iron negative electrode with oxidizing compounds
US-2015060740-A1 · Mar 5, 2015 · US
Nickel-iron battery with a chemically pre-formed (CPF) iron negative electrode
US9935312B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9935312-B2 |
| Application number | US-201414478896-A |
| Country | US |
| Kind code | B2 |
| Filing date | Sep 5, 2014 |
| Priority date | Sep 5, 2013 |
| Publication date | Apr 3, 2018 |
| Grant date | Apr 3, 2018 |
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- Title
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- Abstract
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Abstract
Official abstract text for this publication.
Provided is a Ni—Fe battery comprising an iron electrode which is preconditioned prior to any charge-discharge cycle. The preconditioned iron electrode used in the Ni—Fe battery is prepared by first fabricating an electrode comprising an iron active material, and then treating the surface of the electrode with an oxidant to thereby create an oxidized surface.
First claim
Opening claim text (preview).
What is claimed is: 1. A Ni—Fe battery comprising an electrode which has not been subject to a charge-discharge cycle, the electrode a single layer of conductive substrate coated on at least one side with a coating comprising an iron active material, a polyvinyl alcohol binder and sulfur, which electrode has an oxidized iron surface and areas of interparticle contact that are in an oxidized state different from the oxidized iron surface, and which electrode is prepared by a process comprising: i) fabricating the electrode comprising an iron active material, and ii) treating the surface of the electrode with an oxidant to thereby create an oxidized surface prior to the battery being subjected to a charge-discharge cycle. 2. The battery of claim 1 , wherein the oxidation state of the oxidized iron surface is +2, +2/+3, +3 or +4. 3. The battery of claim 1 , wherein the electrode further comprises a conductive additive. 4. The battery of claim 3 , wherein the conductive additive comprises nickel, or copper or carbon black. 5. The battery 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 wt % binder, and 0.25-20 wt % sulfur. 6. The battery of claim 1 , wherein the substrate of the electrode is comprised of nickel plated steel. 7. The battery of claim 1 , wherein the porosity of the electrode is in the range of about 15-50%. 8. The battery of claim 1 , therein the oxidant comprises water, hydrogen peroxide, ozone, chlorine, nitric acid, hypochlorite, nitrous oxide, bromine, iodine, permanganate compounds, or sodium perborate. 9. The battery of claim 1 , wherein the oxidant comprises water or hydrogen peroxide. 10. The battery of claim 1 , wherein the oxidant comprises a gaseous oxidant.
Assignees
Inventors
Classifications
Manufacturing of an active layer by chemical means · CPC title
Selection of inactive substances as ingredients for active masses, e.g. binders, fillers · CPC title
Electric conductive fillers · CPC title
Processes of manufacture · CPC title
- H01M4/248Primary
Iron electrodes · CPC title
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Frequently asked questions
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- What does patent US9935312B2 cover?
- Provided is a Ni—Fe battery comprising an iron electrode which is preconditioned prior to any charge-discharge cycle. The preconditioned iron electrode used in the Ni—Fe battery is prepared by first fabricating an electrode comprising an iron active material, and then treating the surface of the electrode with an oxidant to thereby create an oxidized surface.
- Who is the assignee on this patent?
- Encell Technology Inc
- What technology area does this patent fall under?
- Primary CPC classification H01M4/248. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Apr 03 2018 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 3 related publications on this page (citations in our corpus or others sharing the same primary CPC).