Electrolytic copper foil for lithium battery negative collector
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For lithium-ion batteries, aluminum foil is usually used as positive collector, while copper foil is used as negative collector. Firstly, copper aluminum foil has good conductivity, soft texture and low price. Secondly, copper aluminum foil is relatively stable in the air. Thirdly, the positive and negative potential of lithium-ion batteries determines that aluminum foil is used for positive electrode and copper foil is used for negative electrode And the electrons generated by the electrochemical reaction are collected and led to the external circuit, so as to form a larger current output, so as to realize the process of chemical energy into electric energy. In order to ensure the stability of the collector in the battery, the purity of both is required to be more than 98%. Electrolytic copper foil is mainly used. Due to its good flexibility, the thickness of copper foil has been reduced from 12um to 10um and then to 8um. Up to now, some battery manufacturers have used 6um.
Product index parameters
Conventional copper foil for lithium battery
AFT-CSpecification Thickness 6um 8um 10um 12um 15um 20um Area weight (g/m2) 53±5% 72±5% 89±5% 107±5% 133±5% 178±5% Tensile strength (kg/mm2) ≧ 28.0 ≧ 28.0 ≧ 28.0 ≧ 28.0 ≧ 28.0 ≧ 28.0 Elongation (%) ≧ 3.0 ≧ 3.0 ≧ 3.0 ≧ 3.0 ≧ 3.0 ≧ 3.0 S-Rz (um) ≦ 2.0 ≦ 2.0 ≦ 2.0 ≦ 2.0 ≦ 2.0 ≦ 2.0 M-Rz (um) ≦ 2.0 ≦ 2.0 ≦ 2.0 ≦ 2.0 ≦ 2.0 ≦ 2.0 Aging(140℃×15min) No discolor High tensile copper foil for lithium battery
AFT-LSpecification Thickness 6um 8um 10um 12um 15um 20um Area weight (g/m2) 54±5% 70±5% 87±5% 105±5% 130±5% 174±5% Tensile strength (kg/mm2) ≧ 40.0 ≧ 40.0 ≧ 40.0 ≧ 40.0 ≧ 40.0 ≧ 40.0 Elongation (%) ≧ 2.0 ≧ 2.0 ≧ 2.0 ≧ 2.0 ≧ 2.0 ≧ 2.0 S-Rz (um) ≦ 2.0 ≦ 2.0 ≦ 2.0 ≦ 2.0 ≦ 2.0 ≦ 2.0 M-Rz (um) ≦ 2.0 ≦ 2.0 ≦ 2.0 ≦ 2.0 ≦ 2.0 ≦ 2.0 Aging(140℃×15min) No discolor High elongation copper foil for lithium battery
AFT-YSpecification Thickness 6um 8um 10um 12um 15um 20um Area weight (g/m2) 54±5% 72±5% 89±5% 107±5% 133±5% 178±5% Tensile strength (kg/mm2) ≧ 28.0 ≧ 28.0 ≧ 28.0 ≧ 28.0 ≧ 28.0 ≧ 28.0 Elongation (%) ≧ 5.0 ≧ 5.0 ≧ 5.0 ≧ 5.0 ≧ 5.0 ≧ 5.0 S-Rz (um) ≦ 2.0 ≦ 2.0 ≦ 2.0 ≦ 2.0 ≦ 2.0 ≦ 2.0 M-Rz (um) ≦ 2.0 ≦ 2.0 ≦ 2.0 ≦ 2.0 ≦ 2.0 ≦ 2.0 Aging(140℃×15min) No discolor Appearance Quality The surface of Copper foil should be flat and clean without obvious defects such as scratches, holes, corrosion and non-metal pressing. Copper foil coil should be wound, does not allow serious wrinkle, bulge, depression or bumps or other defects. Storage Conditions Sealed at Environment with Temperature of 5 ~ 45 ℃, Humidity ≤ 96% Anti-Rain, Anti-Moisture, anti-ibration Shelf Life Storage conditions and shelf life: - 5 ℃ ≤ temperature ≤ 42 ℃, humidity ≤ 70% RH. The shelf life of the product is tentatively determined to be 6 months from the date of production when the required packaging conditions are in good condition. Production process of electrolytic copper foil
Scanning Electron Micrograph
Tensile Strength /Elongation
Delivery Time:In Stock
Please contact AFT for the required width
