Widely distributed across the globe, water wave energy is one of the most promising renewable energy sources, while little has been exploited due to various limitations of current technologies mainly relying on electromagnetic generator (EMG), especially its operation in irregular environment and low frequency (<5 Hz). The newly developed triboelectric nanogenerator (TENG) exhibits obvious advantages over EMG in harvesting energy from low-frequency water wave motions, and the network of TENGs was proposed as a potential approach toward large-scale blue energy harvesting. Here, a review is given for recent progress in blue energy harvesting using TENG technology, starting from a comparison between the EMG and the TENG both in physics and engineering design. The fundamental mechanism of nanogenerators is presented based on Maxwell's displacement current. Approaches of water wave energy harvesting by liquid-solid contact electrification TENG are introduced. For fully enclosed TENGs, the structural designs and performance optimizations are discussed, based on which the TENG network is proposed for large-scale blue energy harvesting from water waves. Furthermore, the energy harvested by TENG from various sources such as water wave, human motion and vibration etc, is not only new energy, but more importantly, the energy for the new era – the era of internet of things.

水波能源是全球最有前途的可再生能源之一，由于其目前的技术主要受电磁发电机（EMG）的各种限制，特别是在不规则环境和低频下运行，水波能一直是未开发的资源。 <5 Hz）。新开发的摩擦电纳米发电机（TENG）在从低频水波运动中收集能量方面具有比EMG明显的优势，并且提出了TENGs网络是实现大规模蓝色能量收集的一种潜在方法。这里，从EMG和TENG在物理和工程设计方面的比较开始，对使用TENG技术进行蓝色能量收集的最新进展进行了回顾。提出了基于麦克斯韦定律的纳米发电机的基本机理 s的位移电流。介绍了液固接触带电TENG收集水波能量的方法。对于完全封闭的TENG，讨论了结构设计和性能优化，并在此基础上提出了TENG网络，用于从水波中大规模收集蓝色能量。此外，滕先生从水波，人体运动和振动等各种来源收集的能量不仅是新能源，更重要的是，新时代的能量–物联网时代。