ELECTRODE ASSEMBLY FOR SECONDARY BATTERY AND LITHIUM SECONDARY BATTERY COMPRISING SAME

• Main Authors: KIM, SOO JUNG, CHUNG, JAE BIN, PARK, BYUNG O
• Format: Patent
• Language: English; French; German
• Published: 25.03.2015
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

Disclosed are an electrode assembly for secondary batteries and a lithium secondary battery including the same. More particularly, an electrode assembly including a cathode, an anode and a separator, wherein the cathode includes a lithium cobalt-based oxide, and a lithium nickel-based composite oxide forming a coating layer over a surface of the lithium nickel-based composite oxide by reacting with a fluorine-containing polymer, as a cathode active material, the anode includes carbon and a silicone oxide as an anode active material, an operating voltage is 2.50 V to 4.35 V, and the cathode active material has high rolling density by a bimodal form in which an average diameter of the cobalt-based oxide and an average diameter of the lithium nickel-based composite oxide are different, and a lithium secondary battery including the same are disclosed. In addition, an electrode assembly including a lithium cobalt-based oxide surface-coated with alumina (Al 2 O 3 ), and a lithium secondary battery including the same are disclosed.