| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a means capable of further improving both capacity retention rate and a cycle life in a lithium-ion secondary battery. <P>SOLUTION: The lithium-ion secondary battery includes an electrode including a current collector and an electrode active material layer, an electrolyte layer, and a relaxation region which is installed at least at one of the current collector and the electrolyte layer, and which suppresses concentration of an electric field. <P>COPYRIGHT: (C)2009,JPO&INPIT |
