Abstract: A core-shell particle includes a core having a chemical structure of Ti(1-x)M1xNb(2-y)M2yO(7-z)Qz, 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 portion of the surface of the core, and the shell layer includes Cu, Nb, Ti, and O.

Abstract: Doped titanium niobate is provided, which has a chemical structure of Ti(1-x)M1xNb(2-y)M2yO(7-z)Qz or Ti(2-x?)M1x?Nb(10-y?)M2y?O(29-z?)Qz?, wherein M1 is Li, Mg, or a combination thereof; M2 is Fe, Mn, V, Ni, Cr, or a combination thereof; Q is F, Cl, Br, I, S, or a combination thereof; 0?x?0.15; 0?y?0.15; 0.01?z?2; 0?x??0.3; 0?y??0.9; and 0.01?z??8.

Abstract: A sulfur doped oxide solid electrolyte powder is provided. The amount of sulfur is 1 wt % to 5 wt % based on the weight of the sulfur doped oxide solid electrolyte powder. A solid state battery is also provided. The solid state battery includes a positive electrode layer, a negative electrode layer, and an electrolyte layer. The electrolyte layer includes the above sulfur doped oxide solid electrolyte powder.

Abstract: A material of phosphorus-doped lithium titanium oxide with spinel structure includes a plurality of lithium titanium oxide particles, wherein a portion or the entirety of the surface layer of the lithium titanium oxide particle is doped with phosphorus. The surface layer is from 1 to 10 nanometers in thickness. Alternatively, the entire lithium titanium oxide particle can be doped with phosphorus. The material can be in powdered form, including a plurality of micro-scale particles each constituted by a plurality of the lithium titanium oxide particles.

Abstract: A material of phosphorus-doped lithium titanium oxide with spinel structure includes a plurality of lithium titanium oxide particles, wherein a portion or the entirety of the surface layer of the lithium titanium oxide particle is doped with phosphorus. The surface layer is from 1 to 10 nanometers in thickness. Alternatively, the entire lithium titanium oxide particle can be doped with phosphorus. The material can be in powdered form, including a plurality of micro-scale particles each constituted by a plurality of the lithium titanium oxide particles.