Anode plate, secondary battery thereof and preparation method

Abstract

The invention relates to the technical field of secondary batteries, in particular to an anode plate, a secondary battery thereof and a preparation method. The anode plate comprises an anode current collector, an anode active material layer and a lubricating coating layer, wherein the anode active material layer is positioned on the anode current collector; the lubricating coating layer is positioned on the anode active material layer; the lubricating coating layer comprises modified silicone oil. The anode plate has the advantages that the cold-press ductility is decreased; by arranging the lubricating coating layer on the anode plate, the flexibility of the anode plate is improved, the cold-press pressure of cold-press equipment and the ductility of the anode plate are reduced, the high-quality rate in a cold-press procedure is improved, the loss of the cold-press equipment is reduced, the belt breaking risk in the cold-press process of the anode plate is decreased, and the manufacturing cost of the cold-press procedure is reduced.

Description

technical field [0001] The present application relates to the technical field of secondary batteries, in particular, to a positive electrode sheet, a secondary battery and a preparation method thereof. Background technique [0002] With the popularization of consumer electronics products such as notebook computers, mobile phones, handheld game consoles, tablet computers, etc., everyone's requirements for their batteries are becoming more and more stringent; capacity, long cycle and stable performance. Among the secondary batteries, compared with other types of batteries, lithium-ion secondary batteries have the advantage of higher energy density, which makes them occupy the mainstream position in the market. [0003] In order to increase the energy density of the battery, the method of increasing the compaction density of the pole piece is usually adopted, but to increase the compaction density of the pole piece, the cold pressing process needs to greatly increase the cold ...

AI Technical Summary

Problems solved by technology

[0003] In order to increase the energy density of the battery, the method of increasing the compaction density of the pole piece is usually adopted, but to increase the compaction density of the pole piece, the cold pressing process needs to greatly increase the cold pressing pressure, which will intensify the wear of the pressing roller and reduce the wear of the cold pressing roller. service life, thereby increasing the manufacturing cost; in addition, increasing the compaction density of the pole piece, the extension of the diaphragm area is also significantly increased, the risk of broken belt is greatly increased, and the utilization rate of the cold pressing equipment is significantly reduced due to the broken belt shutdown, which further improves the manufacturing cost

Images