Copper foil electrolyte, copper foil production method and copper foil electrolysis equipment

Abstract

The invention discloses copper foil electrolyte, a copper foil production method and copper foil electrolysis equipment. The copper foil electrolyte comprises the following substances in parts by weight: 0.5-15 parts of dextrin, 1-30 parts of fish skin collagen, 1-25 parts of thiourea, 10-50 parts of glycerin, 10-250 parts of nickel sulfate, and 150-300 parts of electrolyte, wherein the electrolyte sulfuric acid concentration is 60-110 g / L; and the copper ion concentration is 60-90 g / L. When a produced electrolytic copper foil serves as a solid-state metal lithium positive pole current collector, the chemical corrosion resisting capacity is prominently improved; and two-surface active substances are tightly and uniformly contacted with the current collector, so that the battery charge / discharge stability is improved, and the capacity of resisting rupture and increasing the coating quantity of positive pole active pulp in the charge / discharge process is improved.

Description

technical field [0001] The invention relates to the technical field of copper foil electrolysis, and more specifically refers to a copper foil electrolyte, a copper foil production method and copper foil electrolysis equipment. Background technique [0002] With the development of new energy vehicles, the power battery, which is the heart of new energy vehicles, has received unprecedented attention. However, due to the limited mass specific capacity and volume specific capacity of lithium-ion batteries currently used, the battery life of the car is insufficient, which restricts With the further promotion of new energy vehicles. With the development of consumer electronics and electric vehicle technology, the development of battery systems with higher energy density has become a top priority. Lithium metal has a high quality (3860Ah / KG) and volume (2050Ah / L) energy density, and is used as the negative electrode material of lithium batteries. This battery is a solid metal lit...

AI Technical Summary

Problems solved by technology

The thickness of the aluminum foil is more than 12 μm, the extremely low physical and mechanical strength and the smoothness of both sides lead to the reduction of the coating amount of the positive electrode active material and the weak bonding. The current collector is easy to break during the charge and discharge process, which affects the capacity and safety of the battery.

Ordinary electrolytic copper foil, as the positive current collector, will undergo severe chemical corrosion during the charging and discharging process of the battery, which is not conducive to the stability of the battery. Double-sided light (Rz≤2μm) will cause problems such as uneven and unstable coating of the active material of the pole piece, which will affect its uniformity and stability of charge and discharge

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