Non-aqueous electrolyte secondary battery

• Main Authors: NARUKAWA SATOSHI, NAKANE IKURO, IMACHI NAOKI
• Format: Patent
• Language: English
• Published: 17.04.2003
• Edition: 7
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

An object of the invention is to provide a non-aqueous electrolyte secondary battery having a plateau in voltage in the 4-V region well comparable to that of lithium cobalt oxide, a high energy density, and cell characteristics such as safety, cycle properties, and high temperature storage properties. [Means for Resolution] A non-aqueous electrolyte secondary battery according to the present invention comprises a positive electrode containing a positive electrode active material admixed therein a lithium-containing complex oxide having a layered crystalline structure expressed by general formula LiXMnaCobO2(where X is a value of 0.9 or greater but not greater than 1.1, a is a value of 0.45 or greater but not greater than 0.55, b is a value of 0.45 or greater but not greater than 0.55, and the sum of a and b is greater than 0.9 but not greater than 1.1), together with either of a lithium cobalt oxide and a spinel-type lithium manganate; a negative electrode containing a negative electrode active material capable of intercalating and deintercalating lithium ions; a separator separating the positive electrode and the negative electrode; and a non-aqueous electrolyte.