Study of the Aluminum Anode Oxide Film and Cathode Material Interface of Conductive Polymer Aluminum Solid Electrolytic Capacitor

Abstract

Introduction In 1745, Lyden jar was invented by J.Sesaguliers and Peter Van Muchenbroek. In1855, It was discovered by Charles Weatstone capable of forming an insulating film on the surface of the electrode. (By this discovery, we can make the electrolytic capacitor.) Aluminum electrolytic capacitor, was made by GE, Inc in 1908. And about 1931, aluminum electrolytic capacitor has been commercialized in the United States. Current, aluminum electrolytic capacitor is used in a power supply and noise reduction and an inveter. Electrolytic capacitor has a large equivalent series resistance and electricity is wasted. So, having a small equivalent series resistance, conductive polymer aluminum solid electrolytic capacitors are in practical use. However, conductive polymer aluminum solid electrolytic capacitor, to the leakage current is larger, the withstand voltage is low. It is desirable that this drawback is eliminated. It should be made clear disadvantages mechanism. It seems to be difficult when using typical electrochemical cell. This study was carried out by devising the cell. Experiments, Results and Discussion The anode oxide film even if contaminated with carbon in a conductive polymer was repaired. As a result, the conductive polymer has been shown that increasing the insulating film of the anode oxide film. A conductive polymer aluminum solid electrolytic capacitors made of aluminum foil and a separator, as compared with the electrolytic solution cathode electrolysis capacitance, equivalent series resistance decreases. equivalent series resistance was reduced, especially 10kHz ~ 100kHz. Anodic aluminum after being anode oxidation, affixed a reinforcement seal. It was added dropwise to the electrolyte solution into the hole of the reinforcement label. Put the counter electrode and measured cyclic voltammetry without separator. This experiment shows, the anode oxide film showed it to be damaged by a separator.