I had a strange theory in recent times that in a simple loop ( Circuit-1 in the diagram below ) containing nothing but a diode to ensure DC current, that if you added a simple-component to it ( turning it into Circuit-2 in the diagram ) which is nothing but a much better conductor, that it may be a source of power .
In the diagram below, theoretically, if there was some type of DC-micro-current flowing in Circuit-1, maybe that DC-micro-current would be increased by adding a component to it ( turning it into Circuit-2 in the diagram ) simply made of a much thicker wire or much better conductive material.