Interfacial energy conversion, which harnesses the complex interactions between functional materials and multiphysics fields across diverse spatial and temporal scales, offers a revolutionary approach to tackling current energy challenges. Despite significant progress, comprehending the mechanisms of interfacial energy conversion and developing devices with high efficiency and low energy consumption remains difficult, particularly in complex scenarios involving multiphysics, multiscale, and multiphase processes. Our research is dedicated to uncovering interfacial energy conversion phenomena and designing electrical devices capable of efficiently harvesting energy from renewable sources such as water, sunlight, and heat, as well as their interconnected systems. We aim to develop applications that span from small-scale IoT devices to large-scale multi-source energy harvesting and management systems. Additionally, we are keenly interested in exploring interfacial electrical phenomena, particularly the interaction between water and electricity at the three-phase interface, and applying this understanding to fields such as microfluidics and atmospheric water harvesting.