▎ 摘　　要

NOVELTY - Positive electrode pole piece comprises a positive electrode current collector, first positive electrode coating, second positive electrode coating and a third coating. The positive electrode current collector includes a first side surface and a second side surface opposite to each other, the third coating layer is located on at least one side surface of the first side surface and the second side surface, the first positive electrode coating layer located on the third coating layer, the second positive electrode coating layer is located on the first positive electrode coating layer. The third coating layer contains positive electrode nanoparticles and carbon conductive material particles, and the content of the positive electrode nanoparticles in the third coating layer is 15-25%. The first positive electrode coating layer contains positive electrode nanoparticles. USE - Positive electrode pole piece used in battery (claimed). ADVANTAGE - The first anode coating can increase contact impedance of the anode pole piece when short circuit occurs in the battery so as to reduce short circuit current in the battery, thus reducing heat generated in the battery, and hence reducing risk of battery safety runaway. DETAILED DESCRIPTION - Positive electrode pole piece comprises a positive electrode current collector, first positive electrode coating, second positive electrode coating and a third coating. The positive electrode current collector includes a first side surface and a second side surface opposite to each other, the third coating layer is located on at least one side surface of the first side surface and the second side surface, the first positive electrode coating layer located on the third coating layer, the second positive electrode coating layer is located on the first positive electrode coating layer. The third coating layer contains positive electrode nanoparticles and carbon conductive material particles, and the content of the positive electrode nanoparticles in the third coating layer is 15-25%. The first positive electrode coating layer contains positive electrode nanoparticles, and the content of the positive electrode nanoparticles in the first positive electrode coating layer is 80-95%, the second positive electrode coating contains positive electrode ternary material particles, the median diameter D50 of the positive electrode nanoparticles is 200-1000 nanometer, the median diameter D50 of the positive electrode ternary material particles is 2-10 micrometer.