부품소재

그래핀

DY-Graphene Nano Platelets is
DY-Graphene Nano Platelets, eco-friendly produced graphene, are produced as edge-selectively functionalized graphene nanoplatelets by means of a mechanochemical method (ball-milling) with minimal damages on graphitic basal plane.
In addition, the method is efficient and cost-effective production of a high-quality graphene nano platelets for various applications.

The environmentally friendly graphene DY-Graphene Nano Platelets is produced as an edge-selectively functionalized graphene nano platelets by means of a mechanochemical method on the basal plane without oxidation.

DY-CG
DY-CG is O to the edge carbon is functionalized. The three types of products in accordance with the content of O. Particles have a typical surface area of 400~450 m2/g.
DY-PG
DY-PG is P to the edge carbon is functionalized. The three types of products in accordance with the content of P. Particles have a typical surface area of 100 m2/g.
DY-IG
DY-IG is I to the edge carbon is functionalized. The two types of products in accordance with the content of I. Particles have a typical surface area of 700m2/g.
DY-NG
DY-NG is N to the edge carbon is functionalized. The three types of products in accordance with the content of N. Particles have a typical surface area of 100 m2/g.
DY-CG
The environmentally friendly graphene DY-CG is produced as an edge-selective graphite by means of a mechanochemical method on the basal plane without oxidation.
Edge-carboxylated DY-CG has better conductivity than that of GO. Furthermore, as a composite, when DY-CG use a carboxyl group, various applications are made possible.

Low-cost, high-yield production of graphene nanosheets is essential for practical applications. We have achieved high yield of edge-selectively carboxylated graphite by a simple ball milling of pristine graphite in the presence of CO2. Ball milling can thus provide simple, but efficient and versatile, and eco-friendly (CO2-capturing) approaches to low-cost mass production of high-quality GNs for applications where GOs have been exploited and beyond.
The environmentally friendly graphene DY-CG is produced as an edge-selective graphite by means of a mechanochemical method on the basal plane without oxidation. Edge-carboxylated DY-CG has better conductivity than that of GO. Furthermore, as a composite, when DY-CG use a carboxyl group, various applications are made possible.

Product division
DY-CG-A O content : 15at%
Dy-CG-B O content : 10at%
DY-CG-C O content : 7at%±
Element analysis
Element Atomic %
C 85~93
O 7~15
Properties
Form Powder
Color Black
Odor Odorless
Particle size D10 : 0.2㎛
D50 : 1.2㎛
D100 : 3.2㎛
Dispersion H2O, NMP, IPA etc
Dispersibility(0.05mg/mL in NMP) Z-potential ±30mV
Specific surface area >350m2/g

Applications

  • Supercapacitor electrodes material
  • Anode materials of lithium-ion batteries
  • Electrically conductive inks
  • Thermally conductive films and coatings
  • Additive for lightweight composites
  • Films or coatings for EMI shielding
  • Barrier material for packaging
  • Additive for metal-matrix composites

Element analysis

Element Atomic %
C 85~93
O 7~15

X-ray diffraction

DY-PG
The environmentally friendly graphene DY-PG is produced as an edge-selective graphite by means of a mechanochemical method on the basal plane without oxidation.
PGnP has excellent dispersibility and is widely used in the field of composite materials. In particular, it exhibits excellent properties as flame-retardants.

In order to covalently attach phosphorus to the edges of graphene nanoplatelets, graphite is ball-milled with red phosphorus. The cleavage of graphitic C-C bonds during mechanochemical ball-milling generates reactive carbon species, which react with phosphorus in a sealed ball-mill crusher to form graphene phosphorus. PGnP is readily dispersible in many polar solvents, including neutral water, allowing for solution (spray) coating for highperformance, nontoxic flame-retardant applications.
The environmentally friendly graphene DY-PG is produced as an edge-selective graphite by means of a mechanochemical method on the basal plane without oxidation. DY-PG has excellent dispersibility and is widely used in the field of composite materials. In particular, it exhibits excellent properties as flame-retardants.

Product division
DY-PG-A P content : 15at%
DY-PG-B P content : 10at%
DY-PG-C P content : 7at%
Element analysis
Element Atomic %
C 54~73
O 18~31
P 7~15
Properties
Form Powder
Color Black
Odor Odorless
Particle size D10 : 0.2㎛
D50 : 1.2㎛
D100 : 3.2㎛
Dispersion H2O, NMP, IPA etc
Dispersibility(0.05mg/mL in H₂O) Z-potential ±30mV
Specific surface area 100㎡/g

Applications

  • Flame retardant
  • Electrically conductive inks
  • Thermally conductive films and coatings
  • Additive for lightweight composites
  • Films or coatings for EMI shielding
  • Barrier material for packaging
  • Additive for metal-matrix composites

Element analysis

Element Atomic %
C 54~73
O 18~31
P 7~15

X-ray diffraction

DY-IG
The environmentally friendly graphene DY-IG is produced as an edge-selective graphite by means of a mechanochemical method on the basal plane without oxidation.
The newly-developed DY-IGs can be well dispersed in various solvents, and hence are solution processable.

DY-IG has remarkable electrocatalytic activities toward oxygen reduction reaction(ORR) with a high selectivity, good tolerance to methanol crossover/CO poisoning effects, and excellent long-term cycle stability.
The environmentally friendly graphene DY-IG is produced as an edge-selective graphite by means of a mechanochemical method on the basal plane without oxidation. The newly-developed DY-IG can be well dispersed in various solvents, and hence are solution processable.

Product division
DY-IG-A I content : >0.5at%
Dy-IG-B I content : < 0.5at%
Properties
Form Powder
Color Black
Odor Odorless
Particle size D10 : 0.2㎛
D50 : 1.2㎛
D100 : 3.2㎛
Dispersion H2O, NMP, IPA etc
Dispersibility(0.05mg/mL in H₂O) Z-potential ±30mV
Specific surface area >600㎡/g

Applications

  • Super-capacitor electrodes material
  • Anode materials of lithium-ion batteries
  • Electrically conductive inks
  • Thermally conductive films and coatings
  • Additive for lightweight composites
  • Films or coatings for EMI shielding
  • Barrier material for packaging
  • Additive for metal-matrix composites

Element analysis

Element Atomic %
C 88~94
O 6~10
P 0.5~2

X-ray diffraction

DY-NG
The environmentally friendly graphene DY-NG is produced as an edge-selective graphite by means of a mechanochemical method on the basal plane without oxidation.
DY-NG with superb catalytic performance in both dye-sensitized solar cells and fuel cells can replace conventional Pt-based catalysts for energy conversion.

However, direct nitrogen fixation is challenging as nitrogen (N2) does not easily react with other chemicals. By dry ball-milling graphite with N2, we can produce a simple, but versatile, scalable and eco-friendly, approach to direct fixation of N2 at the edges of graphene nanoplatelets (GnPs).
The environmentally friendly graphene DY-NG is produced as an edge-selective graphite by means of a mechanochemical method on the basal plane without oxidation.
DY-NG with superb catalytic performance in both dye-sensitized solar cells and fuel cells can replace conventional Pt-based catalysts for energy conversion.

Product division
DY-NG-A N content : 15at%
Dy-NG-B N content : 10at%
DY-NG-C N content : 7at%±
Properties
Form Powder
Color Black
Odor Odorless
Particle size D10 : 0.2㎛
D50 : 1.2㎛
D100 : 3.2㎛
Dispersion H2O, NMP, IPA etc
Dispersibility(0.05mg/mL in H₂O) Z-potential ±30mV
Specific surface area >100㎡/g

Applications

  • Super-capacitor electrodes material
  • Anode materials of lithium-ion batteries
  • Electrically conductive inks
  • Thermally conductive films and coatings
  • Additive for lightweight composites
  • Films or coatings for EMI shielding
  • Barrier material for packaging
  • Additive for metal-matrix composites

Element analysis

Element Atomic %
C 72~84
O 9~13
P 7~15

X-ray diffraction