Carbonaceous material, carbonaceous material-containing electrode material for electric double layer capacitor, electrode for electric double layer capacitor, and electric double layer capacitor
US-10984963-B2 · Apr 20, 2021 · US
Carbonaceous material and method for producing same
US11634330B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11634330-B2 |
| Application number | US-201816488862-A |
| Country | US |
| Kind code | B2 |
| Filing date | Feb 23, 2018 |
| Priority date | Feb 27, 2017 |
| Publication date | Apr 25, 2023 |
| Grant date | Apr 25, 2023 |
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Abstract
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The present invention relates to a carbonaceous material which is derived from a plant, having a specific surface area of 1800 to 3000 m2/g as measured by a BET method, a hydrogen element content of 0.42% by mass or less and an oxygen element content of 1.5% by mass or less.
First claim
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The invention claimed is: 1. A carbonaceous material, having a specific surface area of 1800 to 3000 m 2 /g as measured by a BET method, a hydrogen element content of 0.05% by mass or more and 0.42% by mass or less; and an oxygen element content of 0.1% by mass or more and 1.5% by mass or less, wherein the carbonaceous material is derived from a plant and a degree of crystallinity as measured by the ratio I D /I G is from 1.2 to 1.5, wherein I D is the intensity of the D band and I G is the intensity of the G band in the Raman spectrum of the carbonaceous material. 2. The carbonaceous material according to claim 1 , wherein a potassium element content is 500 ppm or less. 3. The carbonaceous material according to claim 1 , wherein an iron element content is 200 ppm or less. 4. The carbonaceous material according to claim 1 , wherein the hydrogen element content is 0.05% by mass or more and 0.3% by mass or less. 5. The carbonaceous material according to claim 1 , wherein the oxygen element content is 0.1% by mass or more and 1.3% by mass or less. 6. A method for producing the carbonaceous material according to claim 1 , the method comprising: heat-treating plant-derived activated carbon which has an average particle diameter of 100 to 10000 μm and a specific surface area of 1600 to 3000 m 2 /g as measured by a BET method, in an inert gas atmosphere comprising a halogen compound at 500 to 1250° C. to produce the carbonaceous material. 7. A method for producing the carbonaceous material according to claim 1 , the method comprising: attaching an alkali metal hydroxide onto plant-derived activated carbon having an average particle diameter of 100 to 10000 μm and a specific surface area of 1600 to 3000 m 2 /g as measured by a BET method; and heat-treating alkali metal hydroxide-attached activated carbon produced in the attaching at 500 to 1250° C. in an inert gas atmosphere comprising a halogen compound to produce the carbonaceous material.
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Classifications
with molecular sieve properties · CPC title
Active carbon · CPC title
Compositional purity · CPC title
Powders or particles, e.g. composition thereof · CPC title
characterised by carbonisation or activation of carbon · CPC title
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- What does patent US11634330B2 cover?
- The present invention relates to a carbonaceous material which is derived from a plant, having a specific surface area of 1800 to 3000 m2/g as measured by a BET method, a hydrogen element content of 0.42% by mass or less and an oxygen element content of 1.5% by mass or less.
- Who is the assignee on this patent?
- Kuraray Co
- What technology area does this patent fall under?
- Primary CPC classification C01B32/318. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Apr 25 2023 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 7 related publications on this page (citations in our corpus or others sharing the same primary CPC).