Currently, the electricity generation of WIEGs based on solid-water interactions is thought to be related to the streaming potential, dragging potential, and waving potential etc. Recently, Dao showed that the corrosion of zinc in seawater also contributes the electricity generation. Nevertheless, the physical and electrochemical interactions between water and active materials/current collectors are not fully investigated due to the complexity at the liquid-solid interfaces. Little attention has been paid to possible electrochemical reactions between the active materials and current collectors, which may generate much higher voltage than the above-mentioned potentials. In addition, there is no rational explanation of the contribution of electrochemical activity of current collectors, functional groups on active materials, and electrolyte ions to the electricity generation of WIEGs. Therefore, it is vital to figure out the role of electrochemistry and solid surface chemistry in the electricity generation of WIEGs to better understand the mechanisms of this emerging technology.