Positive electrode material, positive electrode plate, sodium-ion secondary battery, and electrical device
AssigneeNingde Amperex Technology Limited
InventorYingying Yue
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Abstract
A positive electrode material includes a matrix material NaxNiaFebMncMdO2. A surface of the matrix material includes a polyanionic material. A polyanionic material includes at least one of a phosphate compound, a NASICON compound, a pyrophosphate compound, or a fluorinated phosphate compound. In the matrix material NaxNiaFebMncMdO2, M includes at least one of Co, Mg, Ca, B, Al, Zr, Ti, W, Mo, Cr, Sr, Y, Cd, Sn, Sb, Ce, Li, K, Zn, La, F, Si, or P, 0.7≤x<1.0, 0.2<a≤0.5, 0.2<b≤0.5, 0.2<c≤0.7, 0≤d≤0.2, 0.7≤x/(a+b+c+d)<1.0. Based on a mass of the positive electrode material, a mass percent of the polyanionic material is 1% to 10%.
Claims17
A positive electrode material, wherein the positive electrode material comprises a matrix material NaxNiaFebMncMdO2, a surface of the matrix material comprises a polyanionic material;
- and the polyanionic material comprises at least one of a phosphate compound, a NASICON compound, a pyrophosphate compound, or a fluorinated phosphate compound;
- in the matrix material NaxNiaFebMncMdO2, wherein M comprises at least one of Co, Mg, Ca, B, Al, Zr, Ti, W, Mo, Cr, Sr, Y, Cd, Sn, Sb, Ce, Li, K, Zn, La, F, Si, or P, 0.7≤x<1.0, 0.2<a≤0.5, 0.2<b≤0.5, 0.2<c≤0.7, 0<d≤0.2, 0.7≤x/(a+b+c+d)<1.0;
- and
- based on a mass of the positive electrode material, a mass percent of the polyanionic material is 1% to 10%.
The positive electrode material according to claim 2, 0.65≤BET≤10.
Dependencies are inferred from the claim text.