Coating composition for separator of secondary battery comprising P-doped graphitic carbon nitride, preparation method thereof and Li-S battery comprising the same

摘要

The present invention relates to a composition for coating a secondary battery separator comprising phosphorus-doped graphite carbon nitride, a method of manufacturing the same, and a lithium-sulfur secondary battery including the same, and more specifically, a secondary battery including phosphorus-doped graphite carbon nitride By coating the separator coating composition on the separator of a lithium-sulfur secondary battery, it is possible to prevent diffusion movement of polysulfide eluted from the positive electrode and to reversibly reuse it as an active material, thereby providing high coulomb efficiency and discharge capacity even under positive electrode conditions of high energy density. It can be applied as a lithium-sulfur secondary battery having a long life characteristic.