Carbon catalyst, electrode, and battery
US-2017194653-A1 · Jul 6, 2017 · US
Carbon catalyst, cell electrode, and cell
US11145876B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11145876-B2 |
| Application number | US-201816629538-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jul 3, 2018 |
| Priority date | Jul 13, 2017 |
| Publication date | Oct 12, 2021 |
| Grant date | Oct 12, 2021 |
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Abstract
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A carbon catalyst, a battery electrode, and a battery each having excellent catalytic activity and excellent durability. The carbon catalyst includes iron, exhibits a weight reduction ratio in the temperature range from 200° C. to 1,200° C. of 12.0 wt % or less measured by thermogravimetric analysis in a nitrogen atmosphere, and has a carbon structure that exhibits, in X-ray absorption fine structure analysis of a K absorption edge of the iron, the following (a) and/or (b): (a) a ratio of a normalized absorbance at 7,130 eV to a normalized absorbance at 7,110 eV is 7.0 or more; and (b) a ratio of a normalized absorbance at 7,135 eV to a normalized absorbance at 7,110 eV is 7.0 or more.
First claim
Opening claim text (preview).
The invention claimed is: 1. A carbon catalyst, comprising iron, exhibiting a weight reduction ratio in the temperature range from 200° C. to 1,200° C. of 12.0 wt % or less measured by thermogravimetric analysis in a nitrogen atmosphere, and comprising a carbon structure that exhibits, in X-ray absorption fine structure analysis of a K absorption edge of the iron, the following (a) and/or (b): (a) a ratio of a normalized absorbance at 7,130 eV to a normalized absorbance at 7,110 eV is 7.0 or more; and (b) a ratio of a normalized absorbance at 7,135 eV to a normalized absorbance at 7,110 eV is 7.0 or more. 2. The carbon catalyst according to claim 1 , wherein the carbon catalyst has a ratio of a mesopore volume to a total pore volume of 20% or more. 3. The carbon catalyst according to claim 1 , wherein the carbon catalyst has a content of the iron of 0.01 wt % or more measured by inductively-coupled plasma mass spectrometry. 4. The carbon catalyst according to claim 1 , wherein the carbon catalyst exhibits a nitrogen atom content of 1.0 wt % or more measured by elemental analysis based on a combustion method. 5. The carbon catalyst according to claim 1 , wherein the carbon catalyst exhibits a ratio of a nitrogen atom content to a carbon atom content of 1.1% or more measured by elemental analysis based on a combustion method. 6. The carbon catalyst according to claim 1 , further comprising a metal other than the iron. 7. The carbon catalyst according to claim 1 , wherein the carbon catalyst has a specific surface area of 800 m 2 /g or more measured by a BET method. 8. A battery electrode, comprising the carbon catalyst of claim 1 . 9. A battery, comprising the battery electrode of claim 8 .
Assignees
Inventors
Classifications
Fuel cells · CPC title
composed of a half-cell of a fuel-cell type and a half-cell of the secondary-cell type · CPC title
with one metallic and one gaseous electrode · CPC title
Iron · CPC title
Fuel cells with polymeric electrolytes · CPC title
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- What does patent US11145876B2 cover?
- A carbon catalyst, a battery electrode, and a battery each having excellent catalytic activity and excellent durability. The carbon catalyst includes iron, exhibits a weight reduction ratio in the temperature range from 200° C. to 1,200° C. of 12.0 wt % or less measured by thermogravimetric analysis in a nitrogen atmosphere, and has a carbon structure that exhibits, in X-ray absorption fine str…
- Who is the assignee on this patent?
- Nisshinbo Holdings Inc
- What technology area does this patent fall under?
- Primary CPC classification H01M4/96. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Oct 12 2021 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).