Graphene materials having randomly distributed two-dimensional structural defects
US-9352968-B2 · May 31, 2016 · US
Unitary graphene layer or graphene single crystal
US9533889B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9533889-B2 |
| Application number | US-201213694356-A |
| Country | US |
| Kind code | B2 |
| Filing date | Nov 26, 2012 |
| Priority date | Nov 26, 2012 |
| Publication date | Jan 3, 2017 |
| Grant date | Jan 3, 2017 |
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Abstract
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A unitary graphene layer or graphene single crystal containing closely packed and chemically bonded parallel graphene planes having an inter-graphene plane spacing of 0.335 to 0.40 nm and an oxygen content of 0.01% to 10% by weight, which unitary graphene layer or graphene single crystal is obtained from heat-treating a graphene oxide gel at a temperature higher than 100° C., wherein the average mis-orientation angle between two graphene planes is less than 10 degrees, more typically less than 5 degrees. The molecules in the graphene oxide gel, upon drying and heat-treating, are chemically interconnected and integrated into a unitary graphene entity containing no discrete graphite flake or graphene platelet. This graphene monolith exhibits a combination of exceptional thermal conductivity, electrical conductivity, mechanical strength, surface smoothness, surface hardness, and scratch resistance unmatched by any thin-film material of comparable thickness range.
First claim
Opening claim text (preview).
We claim: 1. A unitary graphene oxide layer or graphene oxide single crystal containing closely packed and chemically bonded parallel graphene oxide planes having an inter plane spacing of 0.335 to 0.40 nm, a thickness greater than 10 nm, an electrical conductivity greater than 1,500 S/cm, a thermal conductivity greater than 600 W/mK, and a physical density greater than 1.8 g/cm3, and an oxygen content of 0.01% to 10% by weight, which unitary graphene oxide layer or graphene oxide…
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Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
Operations & Transport · mapped topic
Chemistry & Metallurgy · mapped topic
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- What does patent US9533889B2 cover?
- A unitary graphene layer or graphene single crystal containing closely packed and chemically bonded parallel graphene planes having an inter-graphene plane spacing of 0.335 to 0.40 nm and an oxygen content of 0.01% to 10% by weight, which unitary graphene layer or graphene single crystal is obtained from heat-treating a graphene oxide gel at a temperature higher than 100° C., wherein the averag…
- Who is the assignee on this patent?
- Zhamu Aruna, Wang Mingchao, Xiong Wei, and 2 more
- What technology area does this patent fall under?
- Primary CPC classification C01B31/043. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Jan 03 2017 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 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).