Ocean waves are promising green sources for energy exploitation, but harvesting such energy is quite challenging due to the apparent drawbacks of ultra-low vibration frequency and low efficiency. Here, a hybrid nanogenerator containing soft-contact cylindrical triboelectric nanogenerator and electromagnetic generator with swing structure was designed for ultra-low frequency wave energy converting. Brushes made of flexible rabbit hairs were introduced to separate stator-rotor pairs, with the function of charge pumping onto dielectric surface, which can reduce the operation resistance and improve the device durability. Based on the swing motion of rotor, over 60 current pulses can be generated within 15 s from either module by one external triggering, implying the output frequency multiplication and operation time extension. The optimized hybrid nanogenerator exhibits the best output response at 0.1 Hz of water wave agitation, delivering a peak power density of 10.16 W·m⁻³ and an average power density of 0.23 W·m⁻³. Furthermore, self-powered temperature mapping and wireless transmitting were successfully realized by a hybrid nanogenerator array to demonstrate its capability in collecting ultra-low frequency water wave energy. The distinctive structure and operation mechanism prompt the proposed hybrid nanogenerator to be a good candidate for large-scale blue energy harvesting.

海浪是用于能源开发的有希望的绿色资源，但是由于超低振动频率和低效率的明显缺点，收集此类能量非常具有挑战性。在这里，设计了一种混合纳米发电机，该发电机包含软接触圆柱形摩擦纳米发电机和具有摆动结构的电磁发电机，用于超低频波能量转换。将由柔性兔毛制成的电刷引入到分开的定子-转子对中，具有将电荷泵送到介电表面上的功能，这可以降低操作阻力并提高设备的耐用性。根据转子的摆动运动，通过一个外部触发，任一模块可在15 s内产生60多个电流脉冲，这意味着输出频率倍增和工作时间延长。^-3和0.23 W·m ^-3的平均功率密度。此外，混合纳米发电机阵列成功实现了自供电温度测绘和无线传输，证明了其具有收集超低频水波能量的能力。独特的结构和运行机制促使所提出的混合纳米发电机成为大规模蓝色能量收集的良好候选者。