▎ 摘　　要

NOVELTY - Pre-sodiumizing pre-sodiumized cathode sheet comprises mixing aromatic hydrocarbons composite with solvent, adding sodium source to obtain pre-sodium solution, and soaking cathode sheet in the pre-sodium solution to obtain pre-sodium cathode sheets. USE - The method is useful for sodium ion secondary battery cathode in battery production and manufacturing. ADVANTAGE - The method improves the controllability of the pre-sodium efficiency of the cathode pole piece, so as to obviously improve the first peripheral coulomb efficiency of sodium pre-natriation pole cathode, eliminates the sodium ion battery in the first charging process of irreversible sodium loss in the process, and improves the energy density and the circulation performance of the sodium-ion battery. The method has simple process and convenient operation. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: pre-sodium-pre-sodium cathode containing pole piece; and odium ion battery.