Patent ID: 9590240
Date: 2017-03-07
CPC Classifications: C01G,H01M,Y02E

Claim:
1. A method for fabricating a metal and non-metal co-doped lithium titanate (LTO) material, comprising: mixing at least one titanium (Ti) containing precursor, at least one lithium (Li) containing precursor, and at least one non-metal dopant precursor in at least one solvent to form a mixture; hydrothermally heating the mixture under a pressure ranging from 1.5 to 5 atm, and a heating temperature ranging from 120 to 200° C. to form nano-sized primary LTO particles, wherein one or more of the nano-sized primary LTO particles are encapsulated by at least one layer of non-metal dopant; calcining the nano-sized primary LTO particles at a first calcination temperature ranging from 450 to 750° C. to form micron-sized secondary LTO spheres; immersing the micron-sized secondary LTO spheres into at least one metal dopant containing solution to incorporate at least one metal dopant into the micron-sized secondary LTO spheres; drying the micron-sized secondary LTO spheres incorporated with the metal dopant in vacuum; and calcining the micron-sized secondary LTO spheres incorporated with the metal dopant at a second calcination temperature ranging from 450 to 750° C. to form the LTO material.