Positive electrode plate, electrochemical apparatus, and apparatus

A positive electrode plate, comprising a current collector and an electrode active material layer disposed on at least one surface of the current collector, wherein

• the current collector comprises a support layer and a conductive layer disposed on at least one surface of the support layer, a single-sided thickness D2 of the conductive layer satisfies 30 nm≤D2≤3 μm, a thickness D1 of the support layer satisfies 1 μm≤D1≤30 μm, and the support layer is made of a polymer material or a polymer composite material;
• and
• the electrode active material layer comprises electrode active materials, a binder, and a conductive agent, and the electrode active materials comprise small particle active materials with an average particle size D50 of 1.0 μm to 7.0 μm and large particle active materials with an average particle size D50 of 7.1 μm to 20.0 μm.