Secondary battery and electronic apparatus

An electronic apparatus, comprising a secondary battery, the secondary battery comprising:

• a positive electrode plate, wherein the positive electrode plate comprises a positive electrode current collector and a positive electrode film layer, wherein the positive electrode film layer is disposed on at least one side of the positive electrode current collector, and the positive electrode film layer comprises a positive electrode active material and organic particles provided on a surface of the positive electrode active material, the organic particles being configured to undergo a thermal polymerization reaction under a heat treatment condition to form an insulating layer covering at least a portion of the surface of the positive electrode active material;
• before the heat treatment, an adhesion force between the positive electrode current collector and the positive electrode film layer is F1 N/m;
• and after the heat treatment, an adhesion force between the positive electrode current collector and the positive electrode film layer is F2 N/m;
• wherein 1≤F2/F1≤2;
• and
• a resistance of the positive electrode plate before the heat treatment is Rbefore, wherein Rbefore is 1 Ω to 3 Ω;
• a resistance of the positive electrode plate after the heat treatment is Rafter;
• and Rafter−Rbefore≥1 Ω;
• wherein the resistance of the positive electrode plate is obtained by testing at room temperature with a test area of 153.94 mm2, a pressure of 3.5 tons, and a holding time of 50 s.