A cathode active material is provided, having d-MoS.sub.2(FeS.sub.2, ZnS)
A cathode material is provided, including the cathode active material. A
method for preparing the cathode active material is provided. A secondary
aqueous lithium-ion battery (LIB) is provided, including the cathode
material. Accordingly, it is possible to fabricate a secondary aqueous
LIB which has an excellent charge/discharge performance and improves the
charge/discharge cycles.