POSITIVE ELECTRODE SHEET HAVING HIGH RATE CAPABILITY, LONG CYCLE, AND HIGH SAFETY FOR USE IN LITHIUM BATTERY, AND PREPARATION METHOD THEREFOR AND APPLICATION THEREOF

Disclosed in the present invention is a positive electrode sheet having high rate capability, long cycle, and high safety for use in a lithium battery, comprising a current collector and a positive electrode material layer located on a surface of the current collector. The positive electrode material layer comprises a first component of at least one selected from Li1-x1Ti1-x1Ax1OPO4, Li1-x1Ti1-x1Ax1PO5, Li2-y1Ti1-y1Ay1OM1O4, and Li2-y1Ti1-y1Ay1M1O5, wherein 0≤x1≤0.7, 0≤y1≤1, A comprises at least one of Nb, Ta, and Sb, and M1 is at least one of Si and Ge. The positive electrode material layer can further comprise a second component. The first component or a mixed component of the first component and the second component in the positive electrode material layer is dispersed between positive electrode active material particles. The lithium battery comprising the positive electrode shows excellent rate capability, cycle performance, and safety. The present invention does not change the main preparation process of the current positive electrode sheet, a separator, and a battery, is compatible with the main preparation process of the positive electrode sheet of an existing lithium ion battery, and is suitable for large-scale application.