POSITIVE ELECTRODE MATERIAL PRECURSOR AND PREPARATION METHOD AND APPLICATION THEREOF

A positive electrode material precursor and a preparation method thereof and an application thereof are provided. The positive electrode material precursor is a core-shell structure, including an inner core, an outer shell, and an intermediate layer provided between the inner core and the outer shell; where the inner core is formed by accumulating a first sheet-like material, and the first sheet-like material is formed by stacking a plurality of layers of a primary sheet-like material; the intermediate layer is formed by accumulating the primary sheet-like material; the outer shell is formed by accumulating a second sheet-like material, and the second sheet-like material is formed by stacking a plurality of layers of the primary sheet-like material; and a layer number of the layers of the primary sheet-like material in the second sheet-like material is less than that in the first sheet-like material.