CO-DOPED LITHIUM ALUMINUM TITANIUM PHOSPHATE SOLID ELECTROLYTE MATERIAL FOR LITHIUM ION BATTERY AND METHOD FOR PREPARING THE SAME

Disclosed herein is a co-doped lithium aluminum titanium phosphate solid electrolyte material for a lithium ion battery, which is represented by formula (I): LiAlBInTi(PO). Also, disclosed herein is a method for preparing a co-doped lithium aluminum titanium phosphate solid electrolyte material, which includes subjecting a first mixture to a grinding treatment, followed by calcination, so as to obtain a powder of a co-doped lithium aluminum titanium phosphate of formula (I); mixing the powder of the co-doped lithium aluminum titanium phosphate with a binder, followed by granulation, so as to obtain a second mixture; subjecting the second mixture to compression molding, so as to obtain a green compact; and subjecting the green compact to a sintering treatment, so as to obtain the co-doped lithium aluminum titanium phosphate solid electrolyte material.