NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY

• Main Authors: NOHMA TOSHIYUKI, MINAMI KEISUKE, FUJIHARA TOYOKI
• Format: Patent
• Language: English
• Published: 13.02.2014
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

To provide a high-capacity non-aqueous electrolyte secondary battery having superior cycle properties and safety. The present invention is a non-aqueous electrolyte secondary battery including electrode cores and a non-aqueous electrolyte containing a non-aqueous solvent, the positive electrode having a positive electrode active material layer formed on the positive electrode core, and the negative electrode having a negative electrode active material layer formed on the negative electrode core. In this non-aqueous electrolyte secondary battery, the non-aqueous solvent includes 25 to 40 vol % ethylene carbonate at 25° C. and 1 atm, the non-aqueous electrolyte includes lithium bis(oxalato)borate, the amount of positive electrode active material in the positive electrode active material layer is equal to or greater than 100 g, the amount of negative electrode active material in the negative electrode active material layer is equal to or greater than 50 g, and the battery capacity of the non-aqueous electrolyte secondary battery is equal to or greater than 15 Ah.