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Vapor Grown Carbon Fiber
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Vapor Grown Carbon Fiber

Vapor Grown Carbon Fiber VGCF for Battery

Vapor grown carbon fibers (VGCFs) have desirable properties, such as relatively high mechanical strength and electrical conductivity both in single fiber and bulk states, including their very special network-like morphology, which improve the performance of electrodes in lead-acid and lithium-ion batteries, especially their cycling characteristics.

  • Brand:

    TOB NEW ENERGY

  • item no.:

    TOB-VGCF

  • order(moq):

    3KG/bag

  • Payment:

    L/C,T/T

  • product origin:

    China

  • shipping port:

    XIAMEN
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Product Detail

Vapor Grown Carbon Fiber VGCF for Battery


Packaging: 3kg/bag

Minimum order quantity: 3kg/bag

SPECIFICATIONS

VGCF-H features and material properties

Vapor grown carbon fibers (VGCFs) have desirable properties, such as relatively high mechanical strength and electrical conductivity both in single fiber and bulk states, including their very special network-like morphology, which improve the performance of electrodes in lead-acid and lithium-ion batteries, especially their cycling characteristics.


1. Features

(1) High purity

(2) High conductivity (conductivity/heat transfer)

(3) Low specific surface area

(4) Good dispersibility


2. Material properties

Item

Value

Average fiber diameter

150

nm

Average fiber length

6

μm

True Density

2.19

g/cm３

Specific surface area

13

m2/g

Specific resistance

0.1

mΩ·cm

Carbon content

＞99.95

wt%

Vapor Grown Carbon Fiber

3. Reduce the amount of additives and binders

(1) High electronic conductivity

Can reduce the usage of conductive additives.

(2) High electrode adhesion

The amount of adhesive used can be reduced (because VGCF-H has a small SSA, it does not absorb too much adhesive.)

NMC：CB： PVDF = 94： 3： 3    

NMC：CB：VGCF-H：PVDF = 94： 2： 1： 3

Vapor Grown Carbon Fiber


Prevents cracking of electrodes when drying

Unit： wt%

Solid content of slurry

NMC

CB

VGCF-H

PVDF

CB

59.5

94

3

-

3

With VGCF-H

64

95

1.5

1

2.5

Drying conditions: 0.5m/min , 100-120℃


CB: 3%, PVDF:3%                                                                                         (CB: 1.5%+VGCF-H: 1.0%), PVDF：2.5%

Vapor Grown Carbon Fiber


VGCF-H exhibited the lowest DCR and the highest output performance


Charge 0.2C, cc-cv, 3.6V, 0.05C

Discharge (0.2, 0.5, 1, 3, 5, 7, 10 C) cc, 2.0V

Vapor Grown Carbon Fiber


VGCF-H exhibited the highest cycle performance


Charge 1.0C, cc-cv, 3.6V, 0.05C

Discharge 1.0C, cc, 2.0V

Vapor Grown Carbon Fiber

Improve low temperature cycle: 0℃


Using VGCF-H/CB/CNT together can improve low temperature cycle

Long fiber VGCF-H can maintain the conductive path between active materials, so it can improve the capacity retention rate.

Experimental conditions

Charge: CC-CV (1.0C), 4.2V·C/50

Discharge: CC (1.0C), 2.8V

Temperature: 0℃

Vapor Grown Carbon Fiber


Improved low temperature characteristics: -20℃


Experimental conditions

Charging: CC (0.5C), 4.2V·C/50

Temperature: -20℃

Using VGCF-H/CB/CNT together can improve low temperature characteristics

In the low temperature range, the impedance of Li+ migration increases, and the long fiber VGCF-H can improve the migration of Li+.


Vapor Grown Carbon Fiber

 Email : tob.amy@tobmachine.com

 Skype : amywangbest86

 Whatsapp/Phone number : +86 181 2071 5609

Related Tags :

Vapor Grown Carbon Fiber

VGCF

VGCF Powder

VGCF Conductive agent

VGCF for Battery

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