Positive plate, preparation method thereof and battery

• Main Authors: WU RONGFANG, LI JIANNIAN, GUO ZIZHU, WANG XI, ZHANG KE
• Format: Patent
• Language: Chinese; English
• Published: 02.07.2024
• 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 batteries, in particular to a positive plate, a preparation method thereof and a battery. The positive plate comprises a current collector, a positive active material layer is arranged on at least one surface of the current collector, and an isolating layer is arranged on the positive active material layer; the isolation layer comprises graphene oxide of which the Zeta potential is (-1) mV-(-13) mV. The isolation layer is arranged on the positive electrode active material layer to isolate transition metal ions dissolved out from the positive electrode active material, so that the transition metal ions are prevented from reaching the negative electrode after passing through the diaphragm to damage the surface structure of the negative electrode and further influence the cycling stability of the battery. 本发明涉及电池技术领域，尤其是涉及一种正极片、其制备方法及电池。所述正极片包括集流体，所述集流体的至少一面上设置正极活性材料层，所述正极活性材料层上设置隔离层；所述隔离层包括Zeta电位为（-1）mV~（-13）mV的氧化石墨烯。本发明通过在正极活性材料层上设置隔离层，以隔离从正极活性材料中溶出的过渡金属离子，防止其通过隔