| 摘要 |
PROBLEM TO BE SOLVED: To provide an electrochemical element eliminating volume expansion of the electrochemical element by suppressing decomposition of an electrolyte on the polarizable electrode surface of the electrochemical element, thereby achieving excellent long-term reliability with less deterioration in electrostatic capacity.SOLUTION: An electrochemical element 1 includes: an electrode laminate including a polarizable electrode which contains active carbon powder and is used as at least one of a positive electrode or a negative electrode, and formed by being wound or laminated between the positive electrode and the negative electrode with a separator interposed therebetween; and a nonaqueous electrolyte containing at least one electrolyte selected from the group of a quaternary ammonium salt or a lithium salt. The electrode laminate is pressed with a surface pressure of 100-400 N/cmby pressing means 8, 9. |
