Ternary positive plate for lithium battery with high safety, high capacity and long cycle as well as preparation method and application of ternary positive plate

The invention discloses a ternary positive plate for a lithium battery with high safety, high capacity and long cycle as well as a preparation method and application of the ternary positive plate. The positive plate comprises a current collector and a positive electrode material layer located on the surface of the current collector, and the positive electrode material layer comprises ternary positive electrode active material particles, a conductive agent, a binder and oxide solid electrolyte particles capable of conducting lithium ions; and the surface capacity of the positive plate is greater than or equal to 4mAh/cm , and the particle size D50 of the oxide solid electrolyte particles is 0.1-3 microns. According to the invention, the oxide solid electrolyte with a specific particle size is added into the positive plate and is matched with the conductive agent and the binder, so that the positive plate of which the surface capacity is greater than or equal to 4mAh/cm can have the characteristic of high safet