Carbonaceous material, and electrode material for electric double layer capacitor, electrode for electric double layer capacitor and electric double layer capacitor that contain carbonaceous material
US-2019295782-A1 · Sep 26, 2019 · US
Modified activated carbon and method for producing same
US11430614B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11430614-B2 |
| Application number | US-201816612204-A |
| Country | US |
| Kind code | B2 |
| Filing date | May 8, 2018 |
| Priority date | May 10, 2017 |
| Publication date | Aug 30, 2022 |
| Grant date | Aug 30, 2022 |
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Abstract
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The present invention relates to a coconut shell-derived modified activated carbon having a BET specific surface area of 1400 to 2000 m2/g, a value of hydrogen content/carbon content of 0.0015 to 0.0055, and intra-skeletal oxygen of 0.9 mass % or less.
First claim
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The invention claimed is: 1. A coconut shell-derived modified activated carbon having a BET specific surface area of 1400 to 2000 m 2 /g, a value of hydrogen content/carbon content of from 0.0015 to 0.0055, and intra-skeletal oxygen of 0.9 mass % or less, wherein a content of particles having a particle diameter of 2 μm or less is 9 vol % or less. 2. The modified activated carbon according to claim 1 , wherein an average particle diameter is from 3.5 μm to 16 μm. 3. The modified activated carbon according to claim 1 , wherein a zeta potential difference is from 30 mV to 100 mV, and a maximum value of zeta potential is 0 mV or more. 4. The modified activated carbon according to claim 1 , wherein an electrical conductivity determined by powder resistance measurement at a load of 12 kN is 9 S/cm or more. 5. A method for producing the modified activated carbon according to claim 1 , the method comprising in random order: acid-washing a coconut shell-derived activated carbon; pulverizing a coconut shell-derived activated carbon to an average particle diameter of from 3.5 μm to 16 μm; classifying a coconut shell-derived activated carbon to achieve a content rate of 9 vol % or less for particles having a particle diameter of 2 μm or less; and heat-treating a coconut shell-derived activated carbon at 900° C. to 1300° C. under an inert gas atmosphere. 6. The method according to claim 5 , further comprising: deacidification under an oxidizing gas atmosphere at 500° C. to 1000° C. after the acid washing. 7. A non-aqueous polarizable electrode, comprising: the modified activated carbon according to claim 1 . 8. An electric double layer capacitor, comprising: the non-aqueous polarizable electrode according to claim 7 . 9. A coconut shell-derived modified activated carbon having a BET specific surface area of 1400 to 2000 m 2 /g, a value of hydrogen content/carbon content of from 0.0015 to 0.0055, and intra-skeletal oxygen of 0.9 mass % or less, wherein a zeta potential difference is from 30 mV to 100 mV, and a maximum value of zeta potential is 0 mV or more. 10. The modified activated carbon according to claim 9 , wherein an average particle diameter is from 3.5 μm to 16 μm. 11. The modified activated carbon according to claim 9 , wherein an electrical conductivity determined by powder resistance measurement at a load of 12 kN is 9 S/cm or more. 12. A method for producing the modified activated carbon of claim 9 , the method comprising in random order: acid-washing a coconut shell-derived activated carbon; pulverizing a coconut shell-derived activated carbon to an average particle diameter of from 3.5 μm to 16 μm; classifying a coconut shell-derived activated carbon to achieve a content rate of 9 vol % or less for particles having a particle diameter of 2 μm or less; and heat-treating a coconut shell-derived activated carbon at 900° C. to 1300° C. under an inert gas atmosphere. 13. The method according to claim 12 , further comprising: deacidification under an oxidizing gas atmosphere at 500° C. to 1000° C. after the acid washing. 14. A non-aqueous polarizable electrode, comprising: the modified activated carbon according to claim 9 . 15. An electric double layer capacitor, comprising: the non-aqueous polarizable electrode according to claim 14 .
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Classifications
- C01B32/318Primary
characterised by the starting materials · CPC title
specially adapted for electrodes (carbonisation or activation of carbon for the manufacture of electrodes H01G11/34) · CPC title
Electric properties · CPC title
Particles with a specific particle size distribution · CPC title
Granulation · CPC title
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- What does patent US11430614B2 cover?
- The present invention relates to a coconut shell-derived modified activated carbon having a BET specific surface area of 1400 to 2000 m2/g, a value of hydrogen content/carbon content of 0.0015 to 0.0055, and intra-skeletal oxygen of 0.9 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 Aug 30 2022 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 6 related publications on this page (citations in our corpus or others sharing the same primary CPC).