| abstract |
General formula Li p M x M y O z F a (wherein N is at least one element selected from the group consisting of Co, Mn and Ni, M is a transition metal element other than Co, Mn and Ni, Al and At least one element selected from the group consisting of alkaline earth metal elements, and lithium represented by 0.9 ≦ p ≦ 1.2, 0.95 ≦ x <2.00, 0 <y ≦ 0.05, 1.9 ≦ z ≦ 4.2, 0 ≦ a ≦ 0.05) As a method for producing a containing complex oxide, lithium is contained by mixing a lithium source, an N element source, an M element source containing Al at least, and a fluorine source if necessary, and firing at 700 to 1100 ° C. in an oxygen containing atmosphere. Process medium which obtains a composite oxide powder, the lithium containing composite oxide powder obtained at the said process 1, the M elemental salt aqueous solution containing Zr and / or Ti at least, and a fluorine source are mixed as needed, and the aqueous medium is obtained from the mixture obtained. After removing the Then, the process 2 baked at 300-1100 degreeC is included.n n n Lithium, composite oxide, secondary battery, nonaqueous electrolyte |