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US-2024429384-A1 · Dec 26, 2024 · US
Graphene powder, electrode paste for lithium ion battery and electrode for lithium ion battery
US2017346098A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2017346098-A1 |
| Application number | US-201515517399-A |
| Country | US |
| Kind code | A1 |
| Filing date | Oct 6, 2015 |
| Priority date | Oct 10, 2014 |
| Publication date | Nov 30, 2017 |
| Grant date | — |
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Abstract
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The present invention relates to preparation of a highly dispersible graphene powder. Further, the present invention includes providing an electrode for a lithium ion battery having good output characteristics and cycle characteristics by utilizing a highly dispersible graphene powder. The present invention also includes providing a graphene powder having a specific surface area of 80 m 2 /g or more to 250 m 2 /g or less as measured by BET measurement, and an oxygen-to-carbon element ratio of 0.09 or more to 0.30 or less as measured by X-ray photoelectron spectroscopy.
First claim
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1 . A graphene powder, having a specific surface area of 80 m 2 /g or more to 250 m 2 /g or less as measured by BET measurement, and an oxygen-to-carbon element ratio (O/C ratio) of 0.09 or more to 0.30 or less as measured by X-ray photoelectron spectroscopy. 2 . The graphene powder according to claim 1 , wherein a nitrogen-to-carbon element ratio (N/C ratio) as measured by X-ray photoelectron spectroscopy is 0.005 or more to 0.02 or less. 3 . The graphene powder according to claim 1 , wherein a ratio of peak intensity I D to peak intensity I G (I D /I G ratio) as measured by Raman spectroscopy is 1 or more to 2 or less. 4 . The graphene powder according to claim 1 , having a powder resistivity of 10 −3 Ω·cm or more to 10 −1 Ω·cm or less. 5 . An electrode paste for a lithium ion battery, comprising: the graphene powder according to claim 1 , an electrode active material, and a binder. 6 . An electrode for a lithium ion battery, comprising the graphene powder according to claim 1 .
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Classifications
for carbon nanotubes or fullerenes · CPC title
Nanotechnology for materials or surface science, e.g. nanocomposites · CPC title
Size or surface area · CPC title
Electronic properties · CPC title
Manufacture or treatment of nanostructures · CPC title
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- What does patent US2017346098A1 cover?
- The present invention relates to preparation of a highly dispersible graphene powder. Further, the present invention includes providing an electrode for a lithium ion battery having good output characteristics and cycle characteristics by utilizing a highly dispersible graphene powder. The present invention also includes providing a graphene powder having a specific surface area of 80 m 2 /g or…
- Who is the assignee on this patent?
- Toray Industries
- What technology area does this patent fall under?
- Primary CPC classification H01M4/625. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Thu Nov 30 2017 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).