Abstract

A capacitor based on niobium pentoxide (anodized niobium) has been successfully produced with conducting polyaniline and polypyrrole as the cathodes, which performs well up to 800 kHz. This has been compared with a commercial tantalum pentoxide capacitor with manganese dioxide as cathode, which performs well only up to 100 kHz. Leakage current, equivalent series resistance and impedance are reported for both devices.

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