Pole piece with uniform thickness of tab ceramic coating and preparation method thereof

• Main Authors: LI FANQUN, WAN HUAFENG, XIA SAISAI, HAN XIAO, XIE TIAN, TAN GE
• Format: Patent
• Language: Chinese; English
• Published: 12.03.2021
• 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 discloses a pole piece with uniform thickness of a tab ceramic coating and a preparation method thereof, aiming at the problems of easy short circuit and lithium precipitation in a tab area in the prior art, the pole piece (1) comprises a foil material (2), the foil material comprises a tab (2.1) and a middle area (2.2), and two sides of the middle area are coated with active substance coatings (3). The connection area of the middle area (2.2) and the tab (2.1) is coated with a ceramic coating (4), and the surface formed bythe ceramic coating (4) and the active substance coatings (3) is parallel to the foil (2). Through adoption of the tab ceramic coating method, the problem of internal short circuit of the battery canbe effectively solved, meanwhile, the tab is coated with the ceramic layer, it can be guaranteed that the thickness of the tab of the pole piece is consistent with that of the middle area, lithium precipitation of the battery