Interlayer distance controlled graphene, supercapacitor and method of producing the same

Patent metadata

Field	Value
Publication number	US-2015103469-A1
Application number	US-201414515010-A
Country	US
Kind code	A1
Filing date	Oct 15, 2014
Priority date	Oct 16, 2013
Publication date	Apr 16, 2015
Grant date	—

Abstract

A method of producing interlayer distance controlled graphene, an interlayer distance controlled graphene composition, and a supercapacitor are provided. A method of producing an interlayer distance controlled graphene involves dispersing a graphene oxide in a solution by using a surfactant, forming a reduced graphene oxide by adding a reducing agent into the solution containing the dispersed graphene oxide, and adding a pillar material that is activated at its both ends by a N 2 + group into the solution containing the reduced graphene oxide to control an interlayer distance of the reduced graphene oxide.

First claim

We claim:

1 . A method of producing an interlayer distance controlled graphene, comprising:
dispersing a graphene oxide in a solution by using a surfactant; forming a reduced graphene oxide by adding a reducing agent into the solution containing the dispersed graphene oxide; and adding a pillar material that is activated at its both ends by a N 2 + group into the solution containing the reduced graphene oxide to control an interlayer distance of the reduced graphene oxide.

2 . The method of claim 1 ,
wherein the pillar material comprises an organic molecule comprising one or more selected from the group consisting of aryl group, alkyl group, vinyl group, allylic group, alcohol group, phenyl group, anthracene, naphthalene, pyrene, tetracene, coronene, and combinations thereof, or comprises a molecule containing an inorganic material selected from the group consisting of C 60 or C 70 buckminsterfullerene, iron oxide, copper oxide, manganese oxide, ferrocene, vanadocene, rhodocene, and combinations thereof.

3 . The method of claim 1 , further comprising:
performing an ultrasonication treatment to homogenize the dispersed graphene oxide, after adding the surfactant.

4 . The method of claim 1 , further comprising:
performing a filtration to remove aggregates that are formed after adding the pillar material.

5 . The method of claim 1 ,
wherein the surfactant comprises a member selected from the group consisting of sodium C 10-16 -alkyl benzene sulfonate, sodium C 10-16 -alkyl sulfate, polyacrylic acid, and combinations thereof.

6 . The method of claim 1 ,
wherein the reducing agent comprises a member selected from the group consisting of hydrazine, hydroiodic acid, sodium borohydride, ascorbic acid, sodium hydroxide, potassium hydroxide, and combinations thereof.

7 . The method of claim 1 ,
wherein the pillar material comprises a member selected from the group consisting of a bis-diazonium salt, a diazonium salt, and combinations thereof.

8 . The method of claim 1 ,
wherein the reduced graphene oxide and the pillar material are crosslinked by binding the molecule contained in the pillar material with the reduced graphene oxide.

9 . The method of claim 1 ,
wherein the solution comprising the reduced graphene oxide comprises a solvent selected from the group consisting of water, dimethyl formamide, N-methyl pyrroldine, ethanol, dimethyl sulfoxide, and combinations thereof.

10 . The method of claim 1 ,
wherein the interlayer distance in the graphene is controlled by a type of the pillar material, a size of the molecule contained in the pillar material or both the type of the pillar material and the size of the molecule contained in the pillar material.

11 . A supercapacitor, comprising:
an anode and a cathode arranged opposite to each other; a separator membrane formed between the anode and the cathode; and an electrolyte, wherein the anode or the cathode comprises an interlayer distance controlled graphene prepared by the method of claim 1 .

12 . The supercapacitor of claim 11 ,
wherein the electrolyte comprises a member selected from the group consisting of an aqueous electrolyte, an organic electrolyte, and combinations thereof.

13 . The supercapacitor of claim 11 ,
wherein the separator membrane is a porous separator membrane that passes an ion.

14 . A graphene composition, the composition comprising:
a plurality of graphene sheets stacked on each other; a pillar group comprising an aromatic structure covalently bonded to two adjacent graphene sheets to control an interlayer distance between the two adjacent graphene sheets.

15 . The graphene composition of claim 14 , the aromatic structure comprises a six-membered carbon ring covalently bonded to a first graphene sheet at one end of the aromatic structure and covalently bonded to a second graphene sheet or another six-membered carbon ring at a para position thereof.

16 . The graphene composition of claim 14 , the aromatic structure comprises two or more six-membered carbon rings covalently bonded to each other at a C1 position or C4 position such that the two or more six-membered carbon rings form a linear linkage disposed between the two adjacent graphene sheets.

Assignees

• Univ Sungkyunkwan Res & Bus

Inventors

• Lee Hyoyoung
• Lee Keun Sik

Classifications

• C01B32/184 Primary

  Preparation · CPC title

• H01G11/36

  Nanostructures, e.g. nanofibres, nanotubes or fullerenes · CPC title

• Y02E60/13

  Energy storage using capacitors · CPC title

• H01G11/52

  Separators · CPC title

• H01G11/58

  Liquid electrolytes · CPC title