Positive electrode, battery, energy-storage apparatus, and electricity-consumption device

Abstract

This disclosure provides a positive electrode sheet, a battery, an energy storage device, and an electrical device. The positive electrode sheet includes a positive current collector, at least one side of which has a positive electrode material layer. The positive electrode material layer includes a positive electrode material, which includes a first particle and a second particle. The second particle is a secondary particle formed by fusing primary particles. The surface of the second particle has gaps, and the interior of the second particle has pores that communicate with the outside through the gaps. The average sphericity of the second particle is S, where S≤0.6.