Electrochemical device and electronic device

An electrochemical device, comprising:

• a positive electrode sheet, a negative electrode sheet, and a separator;
• wherein the positive electrode sheet comprises a positive electrode current collector and a positive electrode material layer disposed on at least one surface of the positive electrode current collector, and the positive electrode material layer comprises a positive electrode active material;
• wherein
• the positive electrode sheet is provided with a plurality of protrusions spaced apart from each other, a height of the protrusions is H m, wherein 20≤H≤80, a radius of the each protrusions is R mm, wherein 0.3≤R≤10, a surface area of the each protrusions is S mm2, wherein 0.08≤S≤2.51, and the protrusions are formed by a portion of the positive electrode sheet protruding on one side along a thickness direction of the positive electrode sheet.