Cathode And Lithium Secondary Battery Manufactured Using Same

Abstract: A cathode according to one embodiment of the present invention comprises a cathode active material layer arranged on at least one side of a cathode current collector, wherein the cathode active material layer includes lithium transition metal phosphate and fluorine-based binder, and, during a flexibility test in which the cathode is lifted after pi (F)-specific measuring rods makes contact on the cathode active material layer, the ratio of porosity p of the cathode active material layer calculated in formula 1, with respect to a maximum pi value D of the measuring rod in which cracks occur, can be 10 or greater. [Formula 1] porosity (P) = {1 - (measured density of cathode active material layer/true density of cathode active material)}×100

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