Considering the electrochemical nature of the AWIEG, electrolyte ions in water would affect their electricity generation performance. Previous works have proved that ion concentration in water is critical for voltage generation. To investigate this effect, the output voltage of the AWIEG with a pair of GP strips as current collectors was recorded by adding 10 µL of NaCl solution with different concentrations, as shown in Figure . It is found that the average output voltage increases obviously with the increment of the NaCl concentration (Figure ). The reason is that NaCl facilitates the anodic oxidation/corrosion of the Cu strip at the wet end due to the enhanced ionic conductivity of water and the complexation of Cl -with Cu 2+ , which promote the electrochemical reactions at the water-Cu interface, leading to higher output voltage. Therefore, seawater with dissolved NaCl is expected to be an ideal liquid for inducing the electricity generation of AWIEG, which is promising for marine industry and activities.