Conductive material dispersed liquid and secondary battery manufactured using the same
US-2019044150-A1 · Feb 7, 2019 · US
Carbon nanotube composition and method of preparing the same
US11565938B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11565938-B2 |
| Application number | US-201816624743-A |
| Country | US |
| Kind code | B2 |
| Filing date | Nov 27, 2018 |
| Priority date | Dec 26, 2017 |
| Publication date | Jan 31, 2023 |
| Grant date | Jan 31, 2023 |
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- Title
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Abstract
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The present invention relates to a carbon nanotube composition including entangled-type carbon nanotubes and bundle-type carbon nanotubes, wherein the carbon nanotube composition has a specific surface area of 190 m2/g to 240 m2/g and a ratio of specific surface area to bulk density of 0.1 to 5.29.
First claim
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The invention claimed is: 1. A carbon nanotube composition comprising a plurality of carbon nanotube units in the form of entangled-type carbon nanotubes and bundle-type carbon nanotubes, wherein the carbon nanotube composition has a specific surface area of 190 m 2 /g to 240 m 2 /g and satisfies the following Equation 1: 0.1≤ X/Y≤ 5.29 <Equation 1> wherein, in Equation 1, X is a number representing a specific surface area of the carbon nanotube composition, and Y is a number representing a bulk density of the carbon nanotube composition, wherein a unit of the specific surface area is m 2 /g, and a unit of the bulk density is kg/m 3 , wherein the carbon nanotube units having an average diameter of 10 nm to 30 nm, and wherein the carbon nanotube units have an interlayer distance (d 002 ) of a carbon crystal of 0.335 nm to 0.342 nm, wherein the interlayer distance is obtained by X-ray diffraction, the carbon nanotube units satisfy the following condition: interlayer distance (d 002 )<0.3448-0.0028 (log φ) wherein φ is an average diameter of the carbon nanotube units, and the carbon nanotube units have a thickness (Lc) in a C-axis direction of the crystal of 40 nm or less. 2. The carbon nanotube composition of claim 1 , wherein the specific surface area of the carbon nanotube composition is 193 m 2 /g to 239 m 2 /g. 3. The carbon nanotube composition of claim 1 , wherein the specific surface area of the carbon nanotube composition is 195 m 2 /g to 239 m 2 /g. 4. The carbon nanotube composition of claim 1 , wherein, the value of Equation 1 is 1 to 5.14. 5. The carbon nanotube composition of claim 1 , wherein the bulk density of the carbon nanotube composition is 25 kg/m 3 to 150 kg/m 3 . 6. The carbon nanotube composition of claim 1 , wherein the bulk density of the carbon nanotube composition is 35 kg/m 3 to 130 kg/m 3 .
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Pretreatment of the substrate before coating · CPC title
of particles · CPC title
by stacking-plane distances or stacking sequences · CPC title
Electronic properties · CPC title
Agglomerated particles · CPC title
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- What does patent US11565938B2 cover?
- The present invention relates to a carbon nanotube composition including entangled-type carbon nanotubes and bundle-type carbon nanotubes, wherein the carbon nanotube composition has a specific surface area of 190 m2/g to 240 m2/g and a ratio of specific surface area to bulk density of 0.1 to 5.29.
- Who is the assignee on this patent?
- Lg Chemical Ltd
- What technology area does this patent fall under?
- Primary CPC classification C01B32/162. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Jan 31 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).