Positive Electrode Material for Sodium-Ion Batteries and Sodium-Ion Battery Having the Same

摘要

Provided are a cathode material for a sodium secondary battery and a sodium secondary battery including the same. The cathode material includes a cathode active material represented by chemical formula 1; and a carbon layer applied to the surface thereof. [Chemical formula 1] Na(Cr_xM_1-x)O_2 wherein M is Ti, V, Mn, Fe, Co, Ni, Cu, Zr, Nb, Mo, Tc, Ru, Rh, Pd, Ag, Cd, Hf, Ta, W, Re, Os, Ir, Pt or Au, and x ranges from 0.8 to 1.