Method for making lithium-ion battery electrode material

A method for making an electrode material of lithium-ion battery, the method comprising:

• providing a lithium source solution and a plurality of titanium source particles, wherein the lithium source solution is formed by dissolving a lithium salt or lithium hydroxide in a solvent, the plurality of titanium source particles comprises at least one of titanium dioxide particles, hydrated titanium dioxide particles, and hydroxy titanium oxide particles;
• mixing the lithium source solution and the plurality of titanium source particles, wherein a molar ratio of lithium to titanium is in a range from about 4:5 to about 9:10, thereby forming a sol;
• dispersing a carbon source compound into the sol to form a sol mixture, a quantity of the carbon source compound is set as a molar ratio of about 1:10 to about 2:1, of carbon element of the carbon source compound to titanium element of the plurality of titanium source particles;
• spray drying the sol mixture to form a plurality of precursor particles, wherein each of the plurality of precursor particles comprises a plurality of titanium dioxide particles, surfaces of each of the plurality of titanium dioxide particles are uniformly wrapped by a plurality of lithium hydroxide particles and a plurality of saccharose particles, and each of the plurality of precursor particles comprises a plurality of thermal transmission paths composed of the interspaces between the plurality of titanium dioxide particles;
• and
• heating the plurality of precursor particles, thereby forming a lithium titanate composite electrode material comprising a plurality of lithium titanate particles,
• wherein a surface modifier is added into the sol mixture before the carbon source compound is dispersed into the sol.