VACANCY-TYPE SODIUM ION POSITIVE ELECTRODE MATERIAL, PREPARATION METHOD THEREFOR, AND USE THEREOF

• Main Authors: LU, Peng, ZHUANG, Zhi, CAI, Yuhong, CHENG, Yue, WU, Huikang, DENG, Cheng, ZHENG, Tianrui, YUAN, Yuan, LIU, Qianqian
• Format: Patent
• Language: Chinese; English; French
• Published: 29.02.2024
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

The present invention provides a vacancy-type sodium ion positive electrode material having an O3 phase, an R-3m space group, and a chemical general formula of NaaNibMncLidMeO2+f, wherein M is at least one of Co, Cr, V, Al, Fe, Sn, B, Cu, Ti, Mg, and Zn, 0.9≤a<1, 0<b<0.6, 0<c<0.8, 0<d<0.3, -0.04≤f ≤0.04, b+c+d+e=1, and the material is electrically neutral. In addition, the present invention further provides a preparation method for the vacancy-type sodium ion positive electrode material and a use of the vacancy-type sodium ion positive electrode material in sodium ion batteries. La présente invention concerne un matériau d'électrode positive aux ions sodium de type à lacunes ayant une phase O3, un groupe d'espace R-3 m et de formule chimique générale NaaNibMncLidMeO2+f, où M est au au moins l'un parmi le Co, le Cr, le V, l'Al, le Fe, le Sn, le B, le Cu, le Ti, le Mg et le Zn, 0,9≤a<1, 0<b<0,6, 0<c<0,8, 0<d<0,3, -0,04≤f≤0,04, b + c + d + e = 1, et le matériau est électriquement neutre. De plus, la présente inv