Cathode foil producing process for electrolytic capacitor
An electrolytic capacitor and preparation process technology, applied in the field of negative electrode foil, can solve the problems such as the deterioration of capacity, leakage current and impedance and other characteristics, reduce the adhesion of titanium and other problems, so as to ensure the normal function, avoid the deterioration and improve the stability. Effect
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Embodiment 1
[0017] The foil used in this embodiment is a 22 μm hard light foil, and the Al% (mass percentage) is ≥ 98%. The above-mentioned foil is washed in 0.3mol / L sodium hydroxide solution at 50°C for 10 seconds, and then subjected to electron beam evaporation treatment. The thickness of the titanium metal coating layer is in the range of 0.5-1 μm, and the foil is immersed in the silane coupling agent solution Immerse in the middle for 10S, the silane coupling agent used is KBM-602, its aqueous solution concentration is 0.1%, and then dried in an oven at 80°C for about 30 minutes. The silane coupling agent polymerizes during the drying and curing process to form a protective layer of silica gel, which forms a protective layer of silica gel on the outer surface of the foil plated with titanium metal film, that is, forms the negative electrode foil for electrolytic capacitors. The initial measured specific volume is 513μF / cm 2 , the specific volume after storage for two weeks is 322μF / ...
Embodiment 2
[0019] The foil used in this embodiment is a 22 μm hard light foil, and the Al% (mass percentage) is ≥ 98%. The above-mentioned foil is washed in 0.3mol / L phosphoric acid solution at 50°C for 10 seconds, and then subjected to electron beam evaporation treatment. The thickness of the titanium metal coating layer is in the range of 0.5-1 μm, and the foil is immersed in the silane coupling agent solution. 10S, the grade of silane coupling agent used is KBM-602, the concentration of its aqueous solution is 0.1%, and the pH value is adjusted to 5.0 with glacial acetic acid. Dry in the oven for about 30 minutes. The silane coupling agent polymerizes during the drying and curing process to form a protective layer of silica gel, which forms a protective layer of silica gel on the outer surface of the foil plated with titanium metal film, that is, forms the negative electrode foil for electrolytic capacitors. The initial measured specific volume is 553μF / cm 2 , the specific volume af...
Embodiment 3
[0021] The foil used in this embodiment is a 22 μm hard light foil, and the Al% (mass percentage) is ≥ 98%. The above-mentioned foil is washed in 0.3mol / L phosphoric acid solution at 50°C for 10 seconds, and then subjected to electron beam evaporation treatment. The thickness of the titanium metal coating layer is in the range of 0.5-1 μm, and the foil is immersed in the silane coupling agent solution. 10S, the grade of silane coupling agent is KBM-602, and the concentration of its aqueous solution is 0.5%. The above-mentioned titanium-plated foil is placed in the silane coupling agent solution and immersed for 20S, and then dried in an oven at 90°C for about 40 minute. The silane coupling agent polymerizes during the drying and curing process to form a protective layer of silica gel, which forms a protective layer of silica gel on the outer surface of the foil plated with titanium metal film, that is, forms the negative electrode foil for electrolytic capacitors. The initial...
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