Solid-Liquid Triboelectric Nanogenerator Based on Vortex-Induced Resonance

Abstract

Energy converters based on vortex-induced vibrations (VIV) have shown great potential for harvesting energy from low-velocity flows, which constitute a significant portion of ocean energy. However, solid-solid triboelectric nanogenerators (TENG) are not wear-resistant in corrosive environments. Therefore, to effectively harvest ocean energy over the long term, a novel solid-liquid triboelectric nanogenerator based on vortex-induced resonance (VIV-SL-TENG) is presented. The energy is harvested through the resonance between VIV of a cylinder and the relative motions of solid-liquid friction pairs inside the cylinder. The factors that affect the output performance of the system, including the liquid mass ratio and the deflection angle of the friction plates, are studied and optimized by establishing mathematical models and conducting computational fluid dynamics simulations. Furthermore, an experimental platform for the VIV-SL-TENG system is constructed to test and validate the performance of the harvester under different conditions. The experiments demonstrate that the energy harvester can successfully convert VIV energy into electrical energy and reach maximum output voltage in the resonance state. As a new type of energy harvester, the presented design shows a promising potential in the field of ‘blue energy’ harvesting.

Ti3C2Tx MXene‐Assisted CuBO2 Hole Transport Layer for High‐Performance Ultraviolet Photodetectors

“…[26,37] Generally, during the Stage 3 when the illumination is turned off, a significant reverse current peak occurs due to the built-in potential generated by the pyroelectric effect (dT/dt < 0), as opposed to that of the heterojunction's built-in electric field. [37,38] Notably, the device utilizing Ti 3 C 2 T x MXene-based HTL effectively mitigates the reverse temperature difference potential through a robust built-in electric field formed in the heterojunction, [24] thereby significantly eliminating this phenomenon. The response time is another crucial parameter for characterizing device performance.…”

Energy Harvesting from Water Flow by Using Piezoelectric Materials

“…variety of mechanical excitation, in which water flow has been proven to be an available candidate. [18,19] However, three challenges remain associated with TEH. First, its significant internal impedance leads to a low output current and thus, a moderate power density, typically > 10 À2 μW mm À3 .…”

“…With its high output voltage, typically between 10 2 and 10 3 V, even at low‐excitation frequencies, [ 7 ] and ease of down scaling to millimeter dimensions, [ 16,17 ] TEH devices have significant potential in harvesting energy from a variety of mechanical excitation, in which water flow has been proven to be an available candidate. [ 18,19 ] However, three challenges remain associated with TEH. First, its significant internal impedance leads to a low output current and thus, a moderate power density, typically > 10 −2 μW mm −3 .…”

Direct Current Triboelectric Nanogenerators, a Perspective from Material Selections

“…With the first invention of the triboelectric nanogenerator (TENG) by Wang's group in 2012 [43], the displacement current was used as the driving force to convert mechanical energy into electric energy [44][45][46]. It opened up an effective alternative for harvesting high-entropy environmental energy with random and low-frequency characteristics [47][48][49][50][51]-wind [52][53][54][55][56], ocean [57][58][59][60][61], biological motion [62][63][64][65][66][67][68][69], mechanical movement [70][71][72][73][74], vibrational energy [75][76][77][78][79], raindrop [80][81][82][83][84], and others [85][86][87][88][89]. Compared with other energy-harvesting technologies…”