Graphitized MWNTs (>99.9%, OD: 20-30nm)
Graphitized high purity multi-walled carbon nanotubes (MWNTs) were produced by a low temperature CVD method and subsequently annealed about twenty (20) hours under condition of inert gas at temperatures between 1600 and 3000°C. These products were characterized for chemical purity, interlayer spacing, and defect healing. The graphitization procedure was found to remove residual metal catalyst in the nanotubes and reduce the wall defects as reflected in a reduced interlayer spacing between the graphene shells. The graphitized MWNTs have the highest graphite crystallization, the high electrical conductivity and the excellent inoxidizability. The electrical conductivity of the graphitized MWNTs is very close to that of graphite powder. And its ignition temperature can reach 800°C.
| Graphitized MWNTs | |
| Product No | NRE-40005 |
| CAS No. | NA |
| Purity | Carbon nanotubes > 99.9wt% |
| Average Diameter | 20-30 nm |
| Average Length | 10-30 um (TEM) |
| Special Surface Area(SSA) | >55m2/g(BET) |
| Tap Density | NA |
| True Density | 2.1g/cm3 |
| Electric Conductivity | > 100 S/cm |
Graphitized MWNTs
Graphitized MWNTs are an advanced form of carbon nanotubes with enhanced properties due to their improved crystalline structure and alignment of graphene layers. Graphitization improves their conductivity, mechanical strength, and thermal stability. These enhanced properties make valuable in a wide variety of applications.
Composite Materials
Reinforcement in Polymers: Graphitized MWNTs are incorporated into polymer matrices to create nanocomposites. These composites exhibit enhanced mechanical properties such as increased strength, stiffness, and impact resistance. The high aspect ratio and excellent dispersion of graphitized MWNTs in the polymer matrix result in superior performance. Applications include:
Aerospace: Lightweight, high-strength materials for aircraft components.
Automotive: Lightweight and durable components for vehicles to improve fuel efficiency.
Sports Equipment: Reinforced materials for equipment like tennis rackets, golf clubs, and helmets.
Conductive Polymers: In conductive polymers, graphitized MWNTs are used to enhance electrical conductivity. These materials are utilized in applications like:
Flexible electronics: Conductive films, sensors, and transparent electrodes.
Wearable electronics: Devices that require lightweight, flexible, and electrically conductive materials.
Energy Storage and Conversion
Supercapacitors: are widely used in supercapacitor electrodes due to their high surface area, electrical conductivity, and mechanical stability. The improved conductivity from graphitization helps enhance the charge/discharge rates and cycling stability of supercapacitors, making them ideal for energy storage in:
Electric vehicles (EVs).
Portable electronics (e.g., smartphones, tablets).
Renewable energy systems for energy storage.
Lithium-Ion Batteries: Graphitized MWNTs are employed in lithium-ion battery anodes and cathodes to improve conductivity and cycling stability. They enhance charge/discharge efficiency and contribute to better energy density and capacity retention over multiple cycles, making them useful in:
Electric vehicles.
Consumer electronics (e.g., laptops, mobile phones).
Grid-scale energy storage.
Fuel Cells: Graphitized MWNTs are utilized as electrocatalyst supports or catalysts in fuel cells, such as proton-exchange membrane (PEM) fuel cells. They improve the efficiency of reactions like hydrogen oxidation and oxygen reduction, essential for Hydrogen fuel cells for clean energy applications.
