A core-shell particle includes a core having a chemical structure of TiM1NbM2OQ, in which M1 is Li or Mg; M2 is Fe, Mn, V, Ni, Cr, or Cu; Q is F, Cl, Br, I, or S; x is 0 to 0.15; y is 0 to 0.15; and z is 0 to 2; and a shell layer wrapping at least a portio...

The present invention provides a ceramic material capable of demonstrating compactness and Li ion conductivity to an extent that enables the use of the ceramic material as a solid-state electrolyte material for a lithium secondary battery, or the like. A c...