| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a high-performance lithium-ion secondary battery that improves cycle life characteristics and preservation properties while showing output characteristics suitable for use in an HEV or a backup power supply. <P>SOLUTION: The lithium-ion secondary battery is provided with a positive-electrode plate in which a positive-electrode mixture layer formed of a lithium-containing composite oxide being a positive-electrode active material is arranged on a positive collector, a negative-electrode plate in which a negative-electrode mixture layer formed of carbon being a negative-electrode active material is arranged on a negative collector, a separator, and an electrolyte composed of a lithium salt and a nonaqueous solvent. At least the surface of either of the positive-electrode mixture layer and the negative-electrode mixture layer is made as a first layer having a positive-electrode active material or a negative-electrode active material that is coated with a resin film. <P>COPYRIGHT: (C)2009,JPO&INPIT |
