Method for reducing core loss and high-frequency impedance of PEDOT solid aluminum electrolytic capacitor
An electrolytic capacitor, high frequency impedance technology, applied in solid electrolytic capacitors, capacitors, capacitor manufacturing and other directions, can solve the problems of large ESR value, loss and high frequency impedance reduction of PEDOT solid aluminum electrolytic capacitors, etc. Performance and use range, simple heat treatment method, effect of improving electrical performance and use range
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Embodiment 1
[0013] Immerse the capacitor core with a specification of 25V1200μF in 5wt% ammonium adipate electrolyte for 30min, take it out, and then conduct aging treatment at room temperature at 29V for 1h to repair the oxide film. Dry the capacitor core after aging treatment in a blast drying oven at 120°C for 10 minutes, and then dry it in a vacuum oven at 90°C for 10 minutes. The dried core was impregnated in PEDOT:PSS dispersion liquid with a solid content of 16% under vacuum condition for 10 min. Take the core out and dry it in a blast drying oven at 120°C for 10 minutes, and then dry it in a vacuum oven at 90°C for 10 minutes. Under the same conditions, the dispersion liquid was impregnated again and dried to obtain a capacitor core with PEDOT, which was named capacitor core A with PEDOT.
Embodiment 2
[0015] Immerse the capacitor core with a specification of 25V1200μF in 5wt% ammonium adipate electrolyte for 30min, take it out, and then conduct aging treatment at room temperature at 29V for 1h to repair the oxide film. Dry the capacitor core after aging treatment in a blast drying oven at 120°C for 10 minutes, and then dry it in a vacuum oven at 90°C for 10 minutes. After drying, the core was impregnated in 4% EDOT monomer solution for 2 minutes, taken out and placed in an oven at 60°C for drying; then taken out and impregnated in 10% ferric p-toluenesulfonate solution for 3 minutes Afterwards, it was taken out and placed in a constant temperature drying oven at 90° C. for oxidative polymerization treatment, and the polymerization reaction time was 5 hours. The polymerized capacitor core was soaked in deionized water, cleaned and dried. The oxidative polymerization step needs to be repeated 4-5 times in order to obtain a capacitor core with PEDOT that satisfies the require...
Embodiment 3
[0017] In a closed space, the capacitor core prepared in Example 1 was placed in m-cresol vapor at 90° C. for 5 minutes. Finally, it was packaged and aged at 29V at 90°C for 1h to obtain PEDOT solid aluminum electrolytic capacitor A.
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