| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an electrode for an electochemical battery, its manufacturing method and an electochemical battery using the same. <P>SOLUTION: This electrode for the electochemical battery is characterized in that a porosity rate in an upper layer of an electrode active material coated on the surface of a collector is higher than that in a lower layer. As a result, the electrode includes an electrode active material having an adjusted porosity rate, especially even after rolling, in which there isn't so much difference in a porosity rate between the inside and the surface but there is a higher porosity rate in an upper layer, and by which an impregnation property for the electrolyte is improved and other charge-discharge characteristics are improved as the reduction of battery capacity is relativelly small even in high-rate charge-discharge operation. And a battery using such electrode is excellent in charge-discharge characteristics. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
