Patent ID: 7767189

Claim:
A method for preparing lithium transitional metal oxides, comprising the steps of: preparing a carbonate precursor using the following substeps: forming a first aqueous solution containing a mixture of at least two of the ions of the following metal elements (“Me n+ ”): cobalt (Co), nickel (Ni), and manganese (Mn); forming a second aqueous solution containing ions of CO 3 2− ; and mixing and reacting said first solution and said second solution to produce the carbonate precursor, Ni 1-x-y Co x Mn y CO 3 ; and preparing said lithium transition metals oxide from said carbonate precursors using the following substeps: evenly mixing Li 2 CO 3 and said carbonate precursor; calcinating the mixed material in high temperature; and cooling and pulverizing the calcinated material to obtain said lithium transition metal oxide, LiNi 1-x-y Co x Mn y O 2 .