Pole piece and battery

• Main Authors: LIANG GUANGLIN, FANG JIALIN
• Format: Patent
• Language: Chinese; English
• Published: 18.06.2024
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

The invention relates to the technical field of lithium batteries, and provides a pole piece and a battery. When the pole piece is a positive pole piece, the internal resistance of the active material coatings of the second edge area and the third edge area is larger than the internal resistance of the active material coating of the main body area, so that the lithium removal speed of the edge areas of the positive pole piece is slowed down, and the phenomenon that the lithium precipitation potential of a negative pole is too low due to the fact that the concentration of overhang edge electrolyte salt is too high in the rapid charging process is reduced; and the problem of lithium separation on the edge of the corresponding negative electrode edge area is not easy to occur. When the pole piece is a negative pole piece, the impedance of the active material coating of the marginal area b and the marginal area c is smaller than that of the active material coating of the main body area, so that the diffusion spee