A wet electrolytic capacitor that includes a plurality of anodes, cathode,
and working electrolyte that is disposed in electrical contact with the
anodes and current collector is provided. Any number of anodes may
generally be employed, such as from 2 to 40, in some embodiments from 3
to 30, and in some embodiments, from 4 to 20. The anodes are thin and
typically have a thickness of about 1500 micrometers or less, in some
embodiments about 1000 micrometers or less, and in some embodiments, from
about 50 to about 500 micrometers. By employing a plurality of anodes
that are relatively thin in nature, the resulting wet electrolytic
capacitor is able to achieve excellent electrical properties. For
example, the equivalent series resistance ("ESR")--the extent that the
capacitor acts like a resistor when charging and discharging in an
electronic circuit--may be less than about 1500 milliohms, in some
embodiments less than about 1000 milliohms, and in some embodiments, less
than about 500 milliohms, measured with a 2-volt bias and 1-volt signal
at a frequency of 1000 Hz.