Electricity and connected chemistry is not my cup of tea, honestly. However I don't think that this would be whatsoever effective. Electricity itself I would consider pretty raw. I can't imagine how putting a sigil into a circuit, just like that, could activate it, because electricity would only move through entire circuit. It would just physically cause battery to discharge and for sigil to be a part of electromagnetic state that disappears when you turn it off.
However I can imagine using electricity on charging a sigil in a way of covering the sigil in some electrolytic material that could be "crystalized" on sigil using electric circuit. Especially if you use cut out sigil from one metal and cover it with another using electricity. That would bring visible change, which when combined with your focused intent could make quite interesting sigil activation.
Similar effect could be a sigil made from material that doesn't dissolve in water, bathing in water with salt or copper sulfate and meditating over it while it gets covered in crystals. Crystals forming with such intent and charged with energy can be part of quite interesting sigil. The slow process and the crystal growth sounds fascinating even to me when thinking about it...
ut in all honesty, I do not think that electricity can replace spiritual energy created by your own focus and intent, as that energy comes into sigil already carrying a purpose, which electricity lacks. It is also purely or mostly physical, while spiritual energy is not...
