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AssigneeContemporary Amperex Technology Co., Limited
InventorsXianghui Liu, Xin Liu, Qisen Huang, Mingling Li, Cheng Li, Qiguo Cai
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A composite current collector and a preparation method therefor, and an electrode sheet, a battery and an electric apparatus. The composite current collector comprises a support layer, and a bonding layer, a first conductive layer and a second conductive layer, which are sequentially arranged in a stacked manner on at least one surface of the support layer, wherein the first conductive layer contains a first metal material, the second conductive layer contains a second metal material, and the grain size of the second metal material is smaller than that of the first metal material. Thus, the fracture strength and tensile modulus of the composite current collector are effectively improved, and the problems of wrinkling and shrinkage in a tab area of the composite current collector are ameliorated.
A composite current collector, comprising a support layer, and a binding layer, a first conductive layer, and a second conductive layer that are sequentially laminated on at least one surface of the support layer, wherein the first conductive layer comprises a first metal material, the second conductive layer comprises a second metal material, and a grain size of the second metal material is smaller than a grain size of the first metal material.
A preparation method of a composite current collector, wherein the method comprises the following steps:
Dependencies are inferred from the claim text.