| 摘要 |
PURPOSE:To prevent the tendency to come to a low molecular weight by using at least a pair of electrodes, an electrolyte, and a polyolefin type separator, to form an electric element, and including 0.001 to 5wt.% of oxidation preventive agent for polyolefin at least in the electrolyte. CONSTITUTION:In an electric element in which a polyolefin type separator is used for the separator of a cell, an electrolyte capacitor, an electric double- layer capacitor, and the like, 0.001 to 5wt.% of an oxidation preventive agent for polyolefin is included at least in the electrolyte. As a result, the separator is protected from the oxygen, the radical, and the like generated in the element, and the tendency to make a low molecular weight owing to the oxidation deteri oration is suppressed, the deterioration of mechanical strength is minimized, and the solution of the low molecular weight substance into the electrolyte is reduced even though the element is used for a long period high temperature service. In this case, as the polyolefin type resin, polyethylene, polypropylene, or the like is used, and as the electrolyte, non-proton type solvent is used. |
