ELECTRODE ASSEMBLY, BATTERY CELL, BATTERY, ELECTRIC DEVICE, POSITIVE ELECTRODE PLATE, AND PREPARATION METHOD THEREOF

An electrode assembly, a battery cell, a battery, an electric device, a positive electrode plate, and a preparation method thereof are provided. The positive electrode plate includes: a positive electrode current collector; and a positive electrode active material layer, disposed on at least a part of a surface of the positive electrode current collector. The positive electrode active material layer includes at least two positive electrode active material segments arranged along a length direction of the positive electrode current collector, and a specific surface area of a positive electrode active material contained in a part of the at least two positive electrode active material segments is greater than a specific surface area of a positive electrode active material contained in another part of the at least two positive electrode active material segments.