Composite current collector for positive electrode, positive electrode plate, secondary battery, and electric apparatus

A composite current collector for positive electrode comprising a support layer and a conductive layer disposed on at least one side of the support layer, the support layer being an organic support layer;

• wherein
• the support layer has a thickness denoted as d1, a tensile strength at break denoted as T1, a yield strength denoted as Q1, and an elastic modulus denoted as G1;
• the conductive layer has a total thickness denoted as d2, a tensile strength at break denoted as T2, and an elastic modulus denoted as G2;
• and
• the composite current collector for positive electrode satisfies the following condition:
• (d1×T1−(d2×T2)×(1−α)−d1×Q1×α)≥800 Pa·m, wherein α=G1/(G1+G2).