High quality graphene powder supply

Graphene powder (enhancement type)

SPECIFICATIONS

Graphene is a two-dimensional material formed by sp² hybridization of a single layer of carbon atoms, with excellent electrical conductivity, thermal conductivity, mechanical strength and chemical stability. Graphene powder is graphene sheets dispersed into powder form, which is convenient for uniform dispersion and application in various materials. In the field of batteries, graphene powder is widely used in new battery technologies such as lithium-ion batteries, supercapacitors, lithium-sulfur batteries, and lithium-air batteries due to its unique properties, significantly improving the performance of batteries.

Application in lithium-ion batteries

Lithium-ion batteries are the most widely used battery technology at present. The application of graphene powder in them is mainly concentrated in the following aspects:

(1) Electrode material enhancer

Improve conductivity: Graphene powder added to positive electrode materials (such as lithium iron phosphate, lithium cobalt oxide) or negative electrode materials (such as graphite, silicon-based materials) can significantly improve the conductivity of the electrode, reduce internal resistance, and improve the rate performance of the battery.

Enhance structural stability: The high mechanical strength of graphene can alleviate the volume expansion problem of electrode materials during charging and discharging, especially silicon-based negative electrode materials, and extend the cycle life of the battery.

Increase specific surface area: Graphene has a large specific surface area and can provide more active sites, thereby increasing the specific capacity of the electrode.

(2) Conductive additive

In traditional lithium-ion batteries, graphene powder can be used as a conductive additive to replace or partially replace traditional conductive carbon black, reduce the amount of addition, and at the same time improve the conductivity of the electrode and the energy density of the battery.

(3) Battery separator coating Graphene powder can be coated on the surface of the battery separator to form a conductive network, which improves the transmission efficiency of lithium ions and improves the mechanical strength and thermal stability of the battery separator.

Application in supercapacitors

Supercapacitors are energy storage devices with high power density. The application of graphene powder in them is mainly reflected in:

High specific surface area: The specific surface area of graphene powder is as high as 2630 m²/g, which can provide a large number of charge storage sites and significantly improve the specific capacity of supercapacitors.

High conductivity: The excellent conductivity of graphene reduces the internal resistance of the electrode and improves the power density of supercapacitors.

Application in lithium-sulfur batteries

Lithium-sulfur batteries are a new type of battery with high energy density, but they face problems such as the "shuttle effect" of polysulfides and poor conductivity of sulfur. The application of graphene powder can significantly improve these problems:

Conductive skeleton: Graphene powder serves as a conductive skeleton for the sulfur positive electrode, improving the conductivity of sulfur while inhibiting the dissolution and diffusion of polysulfides.

High specific surface area: The high specific surface area of graphene can effectively load sulfur and improve the utilization rate of sulfur.

Flexible structure: The flexible structure of graphene can alleviate the volume change of sulfur during charging and discharging, and improve the cycle stability of the battery.

Application in lithium-air batteries

Lithium-air batteries are batteries with extremely high theoretical energy density, but they face problems such as electrolyte decomposition and electrode passivation. The application of graphene powder in lithium-air batteries includes:

Cathode material: As a cathode material, graphene powder provides high specific surface area and abundant catalytic active sites, promoting oxygen reduction reaction (ORR) and oxygen evolution reaction (OER).

Conductive network: The high conductivity of graphene improves the electron transfer efficiency of the cathode and reduces the polarization effect of the battery.

Inhibition of side reactions: The chemical stability of graphene helps to inhibit the decomposition of the electrolyte and the passivation of the electrode.

Application in other batteries

Sodium ion battery: Graphene powder is used as negative electrode material or conductive additive to improve the conductivity and cycle performance of sodium ion battery.

Flexible battery: The flexibility and high conductivity of graphene make it an ideal material for flexible batteries, suitable for emerging fields such as wearable devices.

Advantages of graphene powder in batteries

High conductivity: Improve the electron transfer efficiency of the electrode and reduce internal resistance.

High specific surface area: Provide more active sites and increase the specific capacity of the battery.

Mechanical strength: Enhance the structural stability of the electrode and extend the battery life.

Chemical stability: Show good chemical stability in the battery working environment.

Lightweight: Graphene has a low density, which helps to reduce the weight of the battery.

Packing:10g/bag

Mode: TOB-G1430

Performance:

（1）Little dosage can significantly improve the mechanical properties of materials, For example, When the dosage of 0.02%, unsaturated polyester resin impact strength can be increased by 100%,  increase bending elongation 50%.

（2）Add the graphene that composite liquidity better, easier processing.

（3）Easy scattering, easy grinding.

Handling and storage

Operators should be trained, strictly abide by the rules.

Proposed operators wear appropriate protective clothing,wear suitable chemical protective gloves, avoid breathing, avoid direct contact with eyes and skin. and number of fire equipment and emergency treatment equipment.

Store in a cool, ventilated and dry place. 

Keep the container sealed. Away from fire, heat source. 

With the strong oxidation agent separate storage. 

Storage area is equipped with the appropriate variety and quantity of fire fighting equipment, 

emergency treatment equipment and appropriate container materials.

PACKAGE

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