Positive electrode material of lithium-ion battery and preparation method therefor
摘要
說明書
In a preferred embodiment, the positive electrode material may comprise a doped nickel cobalt manganese active material and optionally a coating layer on at least part of the surface thereof. In one embodiment, the nickel cobalt manganese active material in the doped nickel cobalt manganese active material may have a formula of LiNixCoyMnzO2, where 0.3≤x≤0.99, 0.01≤y≤0.5, 0.01≤z≤0.5, and the values of x, y and z make the algebraic sum of the valence of all elements in the formula zero, wherein dopants of the doped nickel cobalt manganese active material may comprise a first dopant element M, which is at least one selected from a group consisting of Al and Zr; a second dopant element G, which is at least one selected from a group consisting of Y, Ti, Nb, Cr, Er and Mg; and a third dopant element T, which is at least one selected from a group consisting of Ba, V, Sr, Ta, Mo, W and Ce. In one embodiment, the coating layer comprises at least one oxide selected from a group consisting of B2O3, Al2O3, SiO2 and W2O5.
