Positive Electrode And Secondary Battery

Abstract: The present invention pertains to: a secondary battery comprising a secondary battery positive electrode; and a method for manufacturing the secondary battery positive electrode. The secondary battery positive electrode comprises: a current collector; a first positive electrode active material layer disposed on the current collector; and a second positive electrode active material layer disposed on the first positive electrode active material layer, wherein each of the first positive electrode active material layer and the second positive electrode active material layer includes a single particle positive electrode active material and a positive electrode active material having a larger particle size than the single particle positive electrode active material, and the porosity of the first positive electrode active material layer is different from the porosity of the second positive electrode active material layer, or the pore area ratio of the second positive electrode active material layer is 1.05 to 3 times the pore area ratio of the first positive electrode active material layer in the cross-sectional image.

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