Non‐Inertial Driven Hybridized Nanogenerator With Coil Spring for Shore‐Based Water Wave Energy Harvesting

Shore-based water wave energy represents a vast and underexploited renewable resource. This work reports a non-inertial driven hybridized nanogenerator with coil spring (CS-HG), which can convert the water wave energy to electricity by the triboelectric nanogenerator (TENG) and the electromagnetic generator (EMG). Different from the previous works, the CS-HG has a driving board that can be directly excited by the wave, which omits the steps in the traditional design that energy must first be transferred through the outer shell. Besides, the coil spring converts the single-wave excitation into the multi-cycle energy output of the TENG unit. The energy conversion efficiency has been significantly improved based on the effect of the driving board and the coil spring. Under operating conditions at 1 Hz, the TENG and EMG units achieve maximum peak power outputs of 5.80 and 7.89 mW, respectively. The CS-HG can harvest the wave energy and be a power supply for self-powered wireless temperature and humidity sensing systems. This work not only presents an effective strategy for wave energy harvesting but also opens up new possibilities for the development of sustainable marine monitoring systems.