Abstract: A positive electrode according to one embodiment of the present technology is a positive electrode including a positive electrode active material layer disposed on at least one surface of a positive electrode current collector, the positive electrode active material layer includes a lithium transition metal phosphate and a fluorine-based binder, and, in a flexibility evaluation, in which the positive electrode is lifted after bringing measuring rods for each phi (?) into contact with the positive electrode active material layer, a ratio value (=P/D) of a porosity (P) of the positive electrode active material layer calculated by the disclosed Equation 1 to a maximum phi value (D) of the measuring rod at which a crack occurs is greater than or equal to 10.

Abstract: A lithium secondary battery and a manufacturing method thereof, wherein the lithium secondary battery includes a positive electrode, a negative electrode, a separator interposed between the positive electrode and the negative electrode, and an electrolyte, wherein the positive electrode includes a lithium iron phosphate-based compound having an amorphous-content index (AI) of 0.28 or less, preferably 0.20 to 0.28, and more preferably 0.20 to 0.27, as defined by the disclosed Equation (1).

Abstract: A positive electrode including a positive electrode active material layer disposed on at least one surface of a positive electrode current collector, the positive electrode active material layer including a lithium transition metal phosphate, a fluorine-based binder, and a conductive material. The lithium transition metal phosphate includes a carbon coating layer formed on a surface thereof, and a ratio (B/A) of a total weight (B) of the fluorine-based binder to a total weight (A) of carbon of the conductive material and the lithium transition metal phosphate in the positive electrode active material layer is 0.7 to 1.7.