Chang Chun Petrochemical Co., Ltd.

Huei-Fang Huang

Yao-Sheng Lai

Jui-Chang Chou

Kuei-Sen Cheng

Chih-Chung Wu

Ting-Chun Lai

Hsi-Hsing Lo

Electrodeposited copper foils having adequate puncture strength to withstand both pressure application during consolidation with negative electrode active materials during manufacture, as well as expansion/contraction during repeated charge/discharging cycles when used in a rechargeable secondary battery are described. These copper foils find specific utility as current collectors in rechargeable secondary batteries, particularly in lithium secondary battery with high capacity. Methods of making the copper foils, methods of producing negative electrode for use in lithium secondary battery and lithium secondary battery of high capacity are also described.

Copper foil for current collector of lithium secondary battery

Provided are an electrodeposited copper foil, an electrode comprising the same, and a lithium-ion secondary battery comprising the same. The electrodeposited copper foil has a drum side and a deposited side opposing the drum side, wherein at least one of the drum side and the deposited side exhibits a void volume value (Vv) in the range of 0.17 &#x3bc;m/&#x3bc;mto 1.17 &#x3bc;m/&#x3bc;m; and an absolute value of a difference between a maximum height (Sz) of the drum side and a Sz of the deposited side is in the range of less than 0.60 &#x3bc;m.

Electrodeposited copper foil and electrode, and lithium-ion secondary battery comprising the same

Provided are an electrodeposited copper foil, a current collector, an electrode, and a lithium-ion secondary battery comprising the same. The electrodeposited copper foil has a deposited side and a drum side opposite the deposited side. In a first aspect, &#x394;RS between the deposited side and the drum side is at most about 95 MPa, and the deposited side exhibits a Vv in a range from about 0.15 &#x3bc;m/&#x3bc;mto about 1.35 &#x3bc;m/&#x3bc;m. In a second aspect, the deposited side has a Sku of about 1.5 to about 6.5 and the deposited side exhibits a Vv in a range from about 0.15 &#x3bc;m/&#x3bc;mto about 1.35 &#x3bc;m/&#x3bc;m. The characteristics are beneficial to improve the quality of the electrodeposited copper foil, thereby extending the charge-discharge cycle life of a lithium-ion secondary battery comprising the same.

Electrodeposited copper foil, current collector, electrode, and lithium ion secondary battery comprising the same

Provided are an electrolytic copper foil, and an electrode and a copper-clad laminate comprising the same. The electrolytic copper foil comprises a base copper layer having a drum side and a deposited side; wherein the electrolytic copper foil has a Charpy impact strength from 0.4 J/mmto 5.8 J/mm.

Electrolytic copper foil and electrode and copper-clad laminate comprising the same

Provided are an electrolytic copper foil, an electrode comprising the same, and a lithium-ion battery comprising the same. The electrolytic copper foil comprises a drum side and a deposited side opposite each other. The drum side and the deposited side each have a Kurtosis (Sku) in a range of 1.8 to 6.4, a developed interfacial area ratio (Sdr) in a range of 0.06% to 13%, and a texture aspect ratio (Str) in a range of 0.1 to 1. With the surface morphology, the electrolytic copper foil has an improved adhesion strength with the active material, and thus improving the charge-discharge cycle life performance of the lithium-ion secondary battery.

Electrolytic copper foil and electrode and lithium-ion battery comprising the same

The present disclosure relates to an improved, surface-treated copper foil that is resistant to rusting and discoloration. More specifically, the surface-treated copper foil is chromium-free and includes: (a) a copper foil; optionally, (b) a barrier layer on one or both sides of the copper foil, the barrier layer comprising Ni, Zn, Co, Mn, Sn or a mixture thereof; and (c) an organic layer coupled to the one or both sides of the copper foil or one or both barrier layer(s), wherein the sum total of the N, S, and Si elements of the organic layer is more than 5 normalized atomic %.

Surface-treated copper foil

The present disclosure provides an electrodeposited copper foil having a puncture strength value and a tear strength value. A ratio of the puncture strength value to the tear strength value is from 14 to 64. The present disclosure also provides a lithium-ion secondary battery. The lithium-ion secondary battery is manufactured by using the electrodeposited copper foil and has excellent charge-discharge cycle life.

Copper foil for current collector of lithium secondary battery and negative electrode including the same

Electrodeposited copper foils having properties suitable for use as current collectors in lithium-ion secondary batteries are disclosed. The electrodeposited copper foils include a drum side and a deposited side. At least one of the deposited side or the drum side exhibits a void volume (Vv) value in the range of 0.17 to 1.17 &#x3bc;m/&#x3bc;m.

Copper foil with excellent adhesion

Electrodeposited copper foils having properties suitable for use as current collectors in lithium-ion secondary batteries are disclosed. The electrodeposited copper foils include a drum side and a deposited side. At least one of the deposited side or the drum side has a root mean square slope (R&#x394;q) in the range of about 0.03 to about 0.23. In this manner, the copper foil has good durability and workability, as well as good performance as current collectors in lithium-ion secondary batteries.

Electrodeposited copper foil

Electrodeposited copper foils having properties suitable for use as negative electrode current collectors in lithium-ion secondary batteries are disclosed. The copper foil has a yield strength in the range of 11 to 45 kg/mm, and a difference in residual stress between the drum side and the deposited side of at most 95 MPa. Negative electrode current collectors for lithium-ion secondary battery, a lithium-ion secondary battery incorporating the negative electrode, and batteries containing the negative electrode current collector are also disclosed.

Copper foil for negative electrode current collector of lithium ion secondary battery

An electrodeposited copper foil of high toughness having a lightness L* value of the deposit side in the range of 36 to 74, the copper foil having a tensile strength in the range of 40 to 70 kg/mm, and a weight deviation of less than 3%. The electrodeposited copper foils are particularly useful as current collectors for anode components of rechargeable secondary batteries and tend not to form wrinkles during charge-discharge cycles of the battery and are resistant to fracture during pressing of the anode active materials onto the copper foil. Secondary batteries and methods of manufacture are also described.

Electrodeposited copper foil and method for producing the same, and current collector for lithium secondary battery and secondary battery comprising the electrodeposited copper foil

The present disclosure relates to a surface-treated copper foil which exhibits excellent affinity for an active material layer that is applied to the copper foil in the manufacture of a negative electrode (anode), for use in secondary lithium-ion batteries. The copper foil is plated with chromium and zinc and subsequently subjected to an organic treatment. The surface-treated copper has a surface tension of 34 to 58 dyne/cm and a surface roughness (Rz) of 0.8 to 2.5 &#x3bc;m, and comprises: (a) copper foil; (b) a zinc-chromium layer plated one or both sides of the copper foil, wherein the zinc content in the zinc-chromium layer is from 10 to 120 &#x3bc;g/dmand the chromium content in the zinc-chromium layer is from 10 to 35 &#x3bc;g/dm; and (c) an organic hydrophobic layer applied to the zinc-chromium layer.

The present disclosure relates to an improved coated copper foil that exhibits anti-curl and anti-wrinkle properties; and to methods for manufacturing the foil. Typically, the copper foil of the instant disclosure has: (a) a shiny side; (b) a matte side, wherein the matte side has an MD gloss in the range of 330 to 620; (c) a difference in surface roughness (Rz) between the shiny side and the matte side in the range of 0.3 to 0.59 &#x3bc;m; and (d) a difference in tensile strength in the transverse direction of 1.2 kgf/mmor less.

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Taipei, Taiwan

Huei-Fang Huang