| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a nonaqueous electrolyte secondary battery which can be improved in electric discharge capacity even at the time of high-rate discharge in which discharge is performed at relatively large current. <P>SOLUTION: This nonaqueous electrolyte secondary battery comprises a current collector, a mixture layer which is formed on the current collector and includes conductive agent, binding agent and positive electrode active material containing lithium iron phosphate (LiFePO<SB>4</SB>), a positive electrode of which filling density of the mixture layer after formation of the electrode is 1.7 g/cm<SP>3</SP>or more, and nonaqueous electrolyte including a solvent containing ethylene carbonate and chain ether such as 1,2-dimethoxyethane. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
