Positive pole piece, battery and electric equipment

The invention relates to a positive pole piece, a battery and electric equipment. The positive pole piece is applied to the battery and comprises a positive current collector layer and a positive material layer, the positive material layer is arranged on the surface of the positive current collector layer and comprises a plurality of lithium supplementing particles, each lithium supplementing particle comprises a base body and a coating layer, the coating layer is arranged on the periphery of the base body, and the lithium supplementing particles are arranged on the surface of the base body. The plane shrinkage rate alpha of the base body is larger than or equal to 5% and smaller than or equal to 40%; the chemical formula of the substrate is Li < 1 + r > M < 1-p > N < p > O < 4-s > B < s >, rlt; 6.1, 0 < = plt; 0.99, 0 < = slt; 0.1 part; m and N are respectively selected from at least one of iron, cobalt, nickel, titanium, zinc, magnesium, aluminum, manganese, vanadium, chromium, zirconium, copper, niobium, t