Electrochemical apparatus and electronic device

An electronic device, comprising a electrochemical apparatus, the electrochemical apparatus, comprising an electrode assembly, a positive electrode tab, and a negative electrode tab, wherein the electrode assembly comprises a positive electrode plate, a separator, and a negative electrode plate, the separator is disposed between the positive electrode plate and the negative electrode plate, the positive electrode plate comprises a positive electrode current collector and a positive electrode active material layer, the positive electrode active material layer is disposed on a surface of the positive electrode current collector, the positive electrode active material layer comprises a positive electrode active material, the positive electrode tab is connected to the positive electrode current collector, and the negative electrode tab is connected to the negative electrode plate, wherein

• the number a of the positive electrode tabs and the number b of layers of the positive electrode plates satisfy:
• 0.25≤a/b≤1.25;
• a molar percentage X of nickel in the positive electrode active material satisfies:
• X≥60%;
• and
• a thickness h1 of the positive electrode active material layer satisfies:
• 10 μm≤h1≤30 μm.