The Ultracapacitor
is a proven rechargeable energy storage device.
The charge is stored electrostatically (i.e.,physically)
in polarized layers between an ionically conducting
electrolyte and a conducting electrode.
Moreover, the ultracapacitor uses physical
properties to store energy much faster, i.e.,
with more power, than the battery which must
rely on time-consuming chemical reactions.
Also, physical properties mean vastly superior
tolerance to repeated charges and discharges.
Compared to batteries, the ultracapacitor
may have one tenth the energy density of the
former, but has more than thousand times
longer in cycle life.
So, power and life is often the reason for
choosing the ultracapacitor. |
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