Patent ID: 7985503

Claim:
A method for preparing a multi-metal oxide, wherein it comprises the following steps: 1) first mixing a bivalent nickel salt and a bivalent cobalt salt with ammonia water and an ammonium salt to form a complex solution; and 2) then adding the complex solution produced in Step 1) and a mixed solution of a metal salt and an alkali solution into a reaction vessel in parallel flow, stirring to produce deposit of the spherical doped nickelous hydroxide, and washing away impurity ions; 3) drying the deposit of the spherical doped nickelous hydroxide, mixing it uniformly with lithium hydroxide monohydrate, and obtaining the finished product by high-temperature sintering; wherein the molar ratio of the ammonia water to the ammonium salt is 4:1˜5:1, the acid group of the ammonium salt being the same to that of the nickel salt and the cobalt salt.