Polymer capacitor
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A polymer capacitor, or more accurately a polymer electrolytic capacitor, is an electrolytic capacitor with a solid conductive polymer electrolyte. There are four different types:
Rectangular shaped polymer aluminium (black) and tantalum (brown) electrolytic chip capacitors
Cylindrical (wound) polymer aluminium electrolytic capacitors
Conductivities of some electrolytes
OS-CON capacitors with solid TCNQ electrolyte had a typical lilac insulation sleeve
Niobium capacitor
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A niobium electrolytic capacitor is an electrolytic capacitor whose anode is made of passivated niobium metal or niobium monoxide, on which an insulating niobium pentoxide layer acts as a dielectric.
Polymer capacitor
…Hybrid polymer capacitor (Hybrid polymer Al-e-cap) Polymer niobium electrolytic capacitors Polymer Ta-e-caps are available in rectangular surface-mounted device (SMD) chip style. Polymer Al-e-caps and hybrid polymer Al-e-caps are available…
Self-healing in solid niobium capacitors with manganese dioxide electrolyte
Niobium electrolytic chip capacitors are marked with a bar at the positive component side