Positive active material, lithium battery containing same, and method for manufacturing same

• Main Authors: JIHYUN KIM, HYUNJOO JE, CHANGWOOK KIM, YONGCHAN YOU
• Format: Patent
• Language: English
• Published: 12.08.2015
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

A positive active material, a lithium battery containing the positive active material, and a method of manufacturing the positive active material are disclosed. The positive active material includes: a positive active material core particle for intercalating and deintercalating lithium ions; and a coating layer at least partially surrounding the positive active material core particle and including a ceramic composite represented by Formula 1: Li7+aLa3-bZr2-cMdO12+e. In Formula 1, M comprises at least one selected from aluminum (Al), titanium (Ti), scandium (Sc), vanadium (V), yttrium (Y), niobium (Nb), hafnium (Hf), tantalum (Ta), silicon (Si), gallium (Ga), and germanium (Ge), and -1<=a<=1, 0<=b<=2, 0<=c<=2, 0<d<=2, and 0<=e<=1.