Cathode active material for lithium battery and method for making the same

• Main Authors: LI JIAN-GANG, HE XIANG-MING
• Format: Patent
• Language: English
• Published: 30.04.2013
• Subjects: BASIC ELECTRIC ELEMENTS; CABLES; CHEMISTRY; COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F; CONDUCTORS; ELECTRICITY; INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OFSOLID INORGANIC COMPOUNDS; INORGANIC CHEMISTRY; INSULATORS; METALLURGY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING ORDIELECTRIC PROPERTIES

The present disclosure relates to a cathode active material for lithium battery including a metal oxide represented by a formula of LiNi0.5Mn0.5-x-yCoxMgyO2, wherein 0.05@x@0.15 and 0.01@y@0.1. The present disclosure also relates to a method for making a cathode active material including steps of dissolving Ni, Mn, Co, and Mg sources to the liquid solvent at a molar ratio of Ni/Mn/Co/Mg=0.5/(0.5-x-y)/x/y, wherein 0.05@x@0.15, and 0.01@y@0.1 to achieve a liquid solution, adding a precipitant into the liquid solution, to achieve a coprecipitation, separating the coprecipitation from the liquid solution, and heating the coprecipitation mixed with a Li source at a temperature of about 600° C. to about 900° C.