Positive electrode material and preparation method thereof, secondary battery and electric equipment

The embodiment of the invention provides a positive electrode material and a preparation method thereof, a secondary battery and electric equipment, the positive electrode material provided by the embodiment of the invention comprises an inner core and a coating layer arranged on the surface of the inner core, the inner core comprises a ternary positive electrode active material, the coating layer comprises aLi < 3 > PO < 4 >. BB < 2 > O < 3 >. CLiF, a + b + c = 1, and 0 lt; a, b, clt; 1. Li3PO4, B2O3 and LiF are used for carrying out adaptive coating on the ternary positive electrode active material to serve as a coating layer, so that a rapid ion conductor migration channel can be formed on the surface of the ternary positive electrode active material, and the discharge capacity, the cycling stability and the rate capability of the material are improved; the lithium ion consumption can be supplemented, the SEI film is passivated, and the direct contact between the positive electrode material and the electro