Electrode plate, preparation method thereof and lithium ion battery

• Main Author: LIU RONGJIANG
• Format: Patent
• Language: Chinese; English
• Published: 30.05.2023
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

The invention provides an electrode plate, a preparation method thereof and a lithium ion battery. The electrode plate comprises a current collector and an active material layer arranged on at least one side surface of the current collector, a tab groove is inwards formed in the long edge of one side of the active substance layer, and a notch is formed in the long edge of the other side, opposite to the tab groove, of the active substance layer; an opening is formed in one side of the edge of the tab groove, and the tab groove is exposed out of the surface of the current collector; and the gap penetrates through the current collector along the thickness direction of the electrode pole piece. According to the electrode plate provided by the invention, the empty foil region with a relatively large area is arranged at the tab groove, so that the contact area between the tab groove and the tab is increased, the internal resistance is further reduced, the charging speed of the battery is improved, and the temperat