A new energy materials comprehensive electrochemical experiment was designed. A galvanic exchange method was applied to in situ deposit Ag on the Ni foam and to prepare an electrode. The production was characterized by X-ray diffraction (XRD), scanning electron-microscope (SEM) and energy dispersive X-ray spectroscopy (EDS) for the analyses in the aspect of structure and morphology. The as-prepared porous Ag@Ni foam was applied as the current collector of air cathode for the Li-air battery, and the electrochemical performances were evaluated by galvanostatic discharge and cyclic voltammetry (CV). The results show that when the current density is 1 A/m², the capacity is increased from 4 774.4 mA·h/g carbon to 8 203.8 mA·h/g carbon. In this design the synthesis method was simple and controllable. Students’ understanding of the structure and properties of electrode materials can be deepened by the experiment, the experiment also benefits their cultivation of innovation consciousness and comprehensive experimental ability.