Patent ID: 8709279

Claim:
A method of preparing a lithium transition metal oxide comprising: preparing a first solution comprising transition metal ions; preparing a second solution comprising oxalic acid and a precipitating agent; adding the first solution to the second solution to form a combined solution and a precipitate of a transition metal oxalate; and calcining a mixture of a lithium precursor and the transition metal oxalate to form the lithium transition metal oxide; wherein: the precipitating agent comprises ammonium hydrogen oxalate, di-ammonium oxalate, lithium oxalate, sodium oxalate, potassium oxalate, or a mixture thereof; and the transition metal oxalate comprises a compound of formula [M 1 α′ M 2 β′ M 3 γ′ ]C 2 O 4 ; M 1 , M 2 , and M 3 are transition metals; and 0<α′≦1; 0<β′≦1; and 0<γ′≦1.