Patent ID: 11958757
Assignee: BEIJING EASPRING MATERIAL TECHNOLOGY CO., LTD.
Field: Materials, metallurgy (Chemistry)
Classification: CPC C  H  Y | IPC C

Claim 2:
3. A method of preparing the Lithium-Manganese-rich material of claim 1 comprising the following steps:
sintering a lithium-manganese-rich precursor material and ingredients in a component A to obtain a Lithium-Manganese-rich material, wherein the component A comprises a lithium salt and a sodium salt, and further comprises a first dopant containing an element M′;
the lithium-manganese-rich precursor material is at least one substance selected from the substances represented by the chemical formulas MnaCobNicM1−a−b−c(OH)2 and MnaCobNicM1−a−b−cCO3; 
wherein 0.5≤a≤1, 0≤b≤0.5, 0≤c≤0.5, M and M′ are respectively and independently at least one element selected from the group consisting of Al, B, Ba, Ce, Cr, Cu, Fe, K, La, Mg, Mo, Na, Nb, Os, Pr, Re, Ru, Sc, Sr, Sm, Ta, Ti, V, W, Y, Yb, Zn and Zr;
and
a molar ratio of the used amount of the first dopant to the sum of the used amounts of the lithium-manganese-rich precursor material and the first dopant is 0-0.1:1; a molar ratio of the used amount of the lithium salt to the sum of the used amounts of the lithium-manganese-rich precursor material and the first dopant is 1.0-1.6:1, a molar ratio of the used amount of the sodium salt to the used amount of the lithium salt is 0.005-0.3:1; the used amount of the first dopant is calculated in terms of M′ element contained therein, the used amounts of the lithium-manganese-rich precursor material is calculated in terms of a sum of Mn, Co, Ni, M element contained therein, the used amount of the lithium salt is calculated in terms of Li element contained therein, and the used amount of the sodium salt is calculated in terms of Na element contained therein.