Abstract
Abstract A sustainable power source is more and more important in modern society. Ocean wave energy is a very promising renewable energy source, and it is widely distributed worldwide. But, it is difficult to develop efficiently due to various limitations of the traditional electromagnetic generator. In recent years, the newly developed triboelectric nanogenerator (TENG) provides an excellent way to convert water wave energy into electrical energy, which is mainly based on the coupling between triboelectrification and electrostatic induction. In this paper, a review is given for recent advances in using the TENG technology harvesting water wave energy. We first introduce the four most fundamental modes of TENG, based on which a range of wave energy harvesting devices have been demonstrated. Then, these applications’ structure and performance optimizations are discussed. Besides, the connection methods between TENG units are also summarized. Finally, it also outlines the development prospects and challenges of technology.
Highlights
As we all know, it has been proven that energy is the main driving force for the development of the globalThe development of wave energy began in 1799 [6]
The spherical-shell structure is very promising in triboelectric nanogenerator (TENG) for ocean wave energy harvesting
The concept of using the TENG network to harvest ocean wave energy was proposed by Wang et al [24,90] in 2014; the TENG network consists of thousands of TENG units through a certain connection method (Figure 11a), which can output high-power electrical energy
Summary
It has been proven that energy is the main driving force for the development of the global. Nowadays, according to the working principle of these technologies, it can usually be classified into oscillating water columns [13], oscillating wave surge converters [14], point absorbers [15], overtopping systems [16], and bottom-hinged systems [17] Since these wave energy converters (WECs) often use electromagnetic generators (EMGs), their high cost, high weight, and low efficiency cannot meet large-scale commercial demand [18,19], ocean wave energy has not been widely used. Electrons flow between the metal electrodes, and an alternating current is generated by the reciprocal sliding separation and closing of the two thin films This mode, which converts the external excitation to a plane or a rotary slide, is mainly used in wave and rotary mechanical equipment. The advantages of this mode over the vertical contact-separation mode is that it does not require air separation to separate the two frictional layers, which is conducive to packaging, and the efficiency can be up to 70%
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