Lithium Ion Battery Silicate Positive Electrode Material, and Preparation and Application Thereof

A silicate positive electrode material, wherein the silicate positive electrode material comprises a core of LiaCoxT1-xSiyO4 and a carbon coating layer coated on an outer surface of the core, and the silicate positive electrode material comprises the a composition shown in Formula 1:

• LiaCoxT1-xSiyM1-yO4/C I
• wherein T is a metal ion of metal elements selected from the group consisting of Mn, Fe, Ni, Ca, Mg, Al, La, Y, Sc, Zn, Cu, V, Mo, Tc, Ru, Rh, Pd, Cr, and a combination thereof;
• and the a valence of T is the same as a valence of Co in Formula I;
• M is an ion of elements selected from the group consisting of P, V, Ti, Ge, Ga, N, F, S, and a combination thereof;
• 0<x≤1, 0<y≤1, and not both of x and y are 1;
• and
• a value of a makes a total valence of the core of LiaCoxT1-xSiyM1-yO4 0.