- - Aqueous binder for lithium-sulfur secondary battery preparation method thereof and lithium-sulfur secondary battery comprising the same

摘要

The present invention relates to an aqueous binder for a lithium-sulfur secondary battery, a manufacturing method thereof and a lithium-sulfur secondary battery comprising the same. More specifically, citric acid is added to a mixed solution composed of polyethyleneimine and polyvinylpyrrolidone to prepare an aqueous binder (PEI/PVP/CA, PPC). The binder can be applied to a lithium-sulfur secondary battery having stable lifespan properties, high coulomb efficiency, and high discharge capacity through improvements such as suppression of corrosion of a metal current collector, suppression of shuttle reactions, and enhancement in the adhesiveness even in a high energy density sulfur positive electrode.