Sodium supplementing material and preparation method thereof, positive pole piece, electrode assembly, battery and electric device

The invention relates to the technical field of batteries, in particular to a sodium supplementing material and a preparation method thereof, a positive pole piece, an electrode assembly, a battery and an electric device. The sodium supplementing material comprises a sodium supplementing agent and a coating layer arranged on the surface of the sodium supplementing agent, and the coating layer comprises a lattice oxygen stabilizing material and/or an oxygen adsorbing material. The lattice oxygen stabilizing material can stabilize the structure of the sodium supplementing agent, improve the release of lattice oxygen and reduce the release amount of oxygen, the oxygen adsorption layer can filter the released oxygen and reduce the oxygen entering electrolyte, and the lattice oxygen stabilizing material and/or the oxygen adsorption material can improve the release of oxygen in the sodium supplementing material and improve the performance of the battery. 本发明涉及电池技术领域，特别涉及一种补钠材料及其制备方法、正极极片、电极组件、电池和用电装置。补钠材料包括补钠剂和设于补钠