| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a high quality electrochemical cell capable of suppressing deterioration of charge and discharge efficiency, and stably maintaining cycle characteristics of charge and discharge over a long period of time. <P>SOLUTION: An electrochemical cell 1 includes a sealed vessel 2 having a base member 10, a lid member 11 welded to the base member through a welding layer 21, and a demarcated housing space S sealed between both the members, and a chargeable and dischargeable electrochemical element 3 equipped with a positive electrode 25 impregnated with a nonaqueous electrolyte, a negative electrode 27, and an isolation member 26. The electrochemical element has the positive electrode electrically connected onto the base member, and the negative electrode electrically connected to the lid member so as to be laid on top of the positive electrode with the isolation member 26 held in between while moving at least either one of a cation and an anion between itself and the positive electrode through the nonaqueous electrolyte, the lid member is formed of a metal material containing nickel, and the capacitance of the negative electrode is larger than that of the positive electrode. <P>COPYRIGHT: (C)2013,JPO&INPIT |
