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Charging supercapacitors with reversed polarity
Electrolytic capacitor polarization is initially set at the factory by applying voltage to form the insulating oxide layer. That is why caps have a polarity and these standard supercaps are no different. Reversing the polarity will damage the original insulating layer first and then start to form aRead more
Electrolytic capacitor polarization is initially set at the factory by applying voltage to form the insulating oxide layer.
That is why caps have a polarity and these standard supercaps are no different. Reversing the polarity will damage the original insulating layer first and then start to form a new insulating layer with the applied polarity. It is not something that should be allowed to happen, so consider the capacitors damaged, or at least degraded, and they could be unstable and dangerous too.
Here is also what manufacturer says about reversing the polarity:
https://maxwell.com/wp-content/uploads/2021/08/Notes_on_Using_Ultracapacitor_Cells.pdf
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