In our conjecture, in order to intercalate more lithium-ions in electrodes, a large quantity of copper-ions being composed in electrodes should be one of the resultful approach. Initiate from Polyethyleneimine (PEI), a heavy metal ion chelation agent as well as a common material of electron selective layers, there are four imidogens on it, every imidogen could synthesize with one Gallic acid monohydrate. About the resultant of the fully completed reaction of PEI and Gallic acid, two copper-ions are supposed to be chelated with one resultant. It is able to increase the amount of the copper-ions to become twice.