POSITIVE CURRENT COLLECTOR, POSITIVE ELECTRODE PLATE, BATTERY, AND APPARATUS

A positive current collector, a positive electrode plate, a battery, and an apparatus, the positive current collector comprising a support layer, provided with two opposite surfaces in a thickness direction of the support layer, and a conductive layer arranged on at least one of the two surfaces of the support layer, wherein the conductive layer has a thickness Di satisfying 300 nm≤D≤2 μm; and when the positive current collector has a the tensile strain of 3.0% or more, the conductive layer has a sheet resistance growth rate of T≥50%. The positive current collector has higher safety performance and meanwhile higher electrical performance, and thus a positive electrode plate and a battery adopting the positive current collector could have higher safety performance and meanwhile higher electro-chemical performance.