9um-15um Copper Foil Cu Foil for Lithium Battery Raw Material Li-Ion Cell Anode Material

NO

Items

Criteria

Remarks

1

Vibration test

The battery is to be tested in three mutually perpendicular to each axis.

No fire, no explosion

2

Drop Test

Drop the battery from 1m height onto 5cm it 3 times each of X, Y, and Z directions at 25±2°C

3

Short circuiting Test

After standard charge,the battery shall be subjected to a short-circuit condition with a wire of resistance less than 100(o)

4

High temperature test

Leaving the battery at 85°C for 4hours after standard charge

No fire, no explosion

Capacity≥80%C5

5

Heating Test

The temperature of the oven is to be raised at a rate of 5±2°C/min to a temperature of 130±2°C for 30 minutes.

No explosion, no fire

6

Overcharge testing

(NO PCM)

3C 4.6V.

7

Storage Characteristics 1

standard charge and then storage at 25±2°C for 30 days.

Remaining Capacity≥85%

8

Storage Characteristics 2

1

after standard charge and then storage at 60±2°C for 7 days.

Remaining Capacity≥60%

2

the capacity on standard discharge shall be measured after standard charge.

Recovery capacity≥80%

Item

L-Cu-09

L-Cu-10

L-Cu-12

Width (mm)

customized

Thickness (um)

9

10

12

Areal density (g/m2)

85-90

95-100

105-110

Purity(%)   More than 99.9%

Cu ≥99.9%

Fe < 0.0010%

Bi < 0.00020%

Pb < 0.0005%

Roller core inner diameter

76mm

Width

200mm

Tensile strength (MPa)

≥294

≥300

≥305

Normal elongation(%)

2.5

2.7

3.0

High temperature Tensile strength180℃(MPa)

≥147

≥150

≥153

High temperature elongation180℃(%)

2

2

2.5

Anti oxidization(180℃ Heating 1h)

No oxidation of points on the surface,The color does not change,Copper foil without fracture

Surface roughness(um)Rz

Drum side(um)

Less than 0.3

Less than 0.3

Less than 0.35

Matte side(um)

Less than 3.0

Less than 3.5

Less than 4.0

Surface tension(dyne/cm)

Drum side

62

65

68

Matte side

62

65

68

Coating performance

Cu foil with uniform tension on both sides, slurry coating uniformity