LAYERED SODIUM ION BATTERY POSITIVE ELECTRODE MATERIAL AND PREPARATION METHOD THEREFOR AND USE THEREOF

• Main Authors: GUAN, Xiaoli, XU, Kaihua, LI, Xueqian, GONG, Zhengjie, ZHANG, Kun, LI, Cong
• Format: Patent
• Language: Chinese; English; French
• Published: 29.08.2024
• Subjects: BASIC ELECTRIC ELEMENTS; CHEMISTRY; COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F; ELECTRICITY; INORGANIC CHEMISTRY; METALLURGY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

Provided are a layered sodium ion battery positive electrode material and a preparation method therefor and a use thereof. The chemical formula of the layered sodium ion battery positive electrode material is NaaMgbCuxFeyMnzO2, wherein a+2x+3y+4z+2b=4, and 0.85≤a≤0.95, 0.05≤b≤0.1, x>0, y>0, z>0, and the valence of Mn is +4. The sodium ion positive electrode material is doped with a proper amount of magnesium, so that trivalent manganese in the material can be completely oxidized into tetravalent manganese, and the reduction of Mn4+ at low potential can be inhibited. L'invention propose un matériau d'électrode positive de batterie sodium-ion en couches, ainsi que son procédé de préparation et son utilisation. La formule chimique du matériau d'électrode positive de batterie sodium-ion en couches est NaaMgbCuxFeyMnzO2, où a + 2x + 3y + 4z + 2b = 4, et 0,85 ≤ a ≤ 0,95, 0,05 ≤ b ≤ 0,1, x > 0, y > 0, z > 0, et la valence de Mn est +4. Le matériau d'électrode positive aux ions sodium est dopé avec une quantité appro