Manufacturing method of negative electrode current collector

• Main Authors: LI JINMING, XU YONGZHANG
• Format: Patent
• Language: Chinese; English
• Published: 13.10.2023
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

The invention relates to the field of lithium battery material manufacturing, in particular to a negative electrode current collector manufacturing method which is characterized in that a negative electrode current collector is prepared through the modes of vacuum magnetron sputtering coating, micro-etching, copper plating, coating and drying. According to the invention, the Ni-Cu alloy film is used as a porous alloy material and has abundant nanometer and micron-sized pore structures, so that the adhesive force between the current collector and the negative electrode material is improved, the separation effect between the silicon-containing negative electrode and the current collector due to the expansion problem in the charging and discharging process is reduced, and the cycle performance of the silicon-based negative electrode is improved; and a space is provided for Si volume expansion through the pore structure, and the stress caused by expansion is reduced, so that the pulverization condition of the sil