Thread: A new type of capacitor?

I came with idea of the next energy storage device:
We have two plates similar to plates of capacitor which are made of material with
mixed electron-hole conductivity.Both of those carriers should have excellent mobility
in such material.Those two plates are separated by p-type conductor.During charging
electrons migrate from one plate to another through metal wire.And holes follow electrons
along p-type conductor.In charged state we get excess of both electrons and holes on
one plate and lack of both carrier on another.During discharge electrons and holes
flow in opposite direction and their concentration equilizes.I guess that voltage of such
``capacitor`` will be determined by breakdown voltage of p-type separator.
Will that thing work?

I don't see how it possibly could. I am not an EE or anything but there seem to be couple of problems. First how can a hole follow an electron?

It doesn't make much sense to me, either. As Origin says, holes and electrons must move in opposite directions. Also, because you have a conducting layer between the plates you will simply have a current flow when you try and "charge" it - the "capacitor plates" will simply act as low-resistance contacts to the semiconductor layer.

And, when you stop "charging", if there were any charge on the plates it would simply equalise across the conducting layer in the middle.

At the very best, you seem to have invented the bipolar junction transistor:

Code:

    +
    |
    |
---------    <--  n-doped "plate" (collector)
XXXXXXXXX    <--  p-doped "dielectric" (base)
---------    <--  n-doped "plate" (emitter)
    |
    |
    -

I don't see how it possibly could. I am not an EE or anything but there seem to be couple of problems. First how can a hole follow an electron?

Very easily.The same thing happens in usual supercapacitor when positive ions follow electrons.

And, when you stop "charging", if there were any charge on the plates it would simply equalise across the conducting layer in the middle.

In common supercapacitor electrolyte between plates is also conductive.But when after charging you unlock electric circuit ions do not flow between plates.This is because they equalized by electrons.The separator im my capacitor suppose to conduct only holes,not electrons.

Hmmm... OK. Sounds like I need to read more about how supercaps work.

One of the problem with supercaps is that they can`t withstand high voltages.
This is beacause there is no known liquid electrolyte which is able to work
at voltage over 5 V without decomposing.I try to realize whether p-doped
semiconductor will be free of this problem.And what is limit to voltage it can
withstand?

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