Output Characteristics of an Electromagnetic–Triboelectric Hybrid Energy Harvester Based on Magnetic Liquid

Abstract

The hybrid of a triboelectric nanogenerator (TENG) and an electromagnetic generator (EMG) has been shown to be an effective approach toward harvesting vibration energy. Therefore, in this work, a triboelectric–electromagnetic hybrid energy harvester based on magnetic liquid is proposed. The magnetic liquid (prepared by Beijing Shenran Magnetic Fluid Co., Ltd) is made with water, an active agent, and ferromagnetic particles. Electrostatic induction between the polymer sidewall and the solvent water activates a triboelectric generator component, while electromagnetic induction between the suspended ferromagnetic particles and an outer coil activates the electromagnetic generator component. Initially, the harvester is deduced theoretically to show the feasibility of the design. Then, the output performance of the energy harvester is fully investigated under various dynamical experiments. Finally, experimental results show that the hybrid energy harvester has very low threshold amplitude and wide operating frequency range, both of which can be particularly advantageous for harvesting subtle and irregular vibrations.

Mechanical Vibration Energy Harvesting and Vibration Monitoring Based on Triboelectric Nanogenerators

“…Similarly, liquid‐based TENG devices can also be combined with other power generation mechanisms. [ 151 ] Seol et al [ 152 ] proposed a vibration energy harvester based on ferrofluid, as shown in Figure 11i. The ferrofluid, also known as magnetic liquid, has both the fluidity of liquid and the magnetism of solid magnet.…”

A tuned triboelectric nanogenerator using a magnetic liquid for low-frequency vibration energy harvesting

“…Recently, magnetic liquids have been extensively utilized in the realm of power generation. [28][29][30] Magnetic liquids have the characteristics of stability and good fluidity, and TENGs can use them as a friction layer. And the natural frequency of magnetic liquids may be changed by changing the external magnetic field because of the special magnetic characteristics of magnetic liquids.…”

Inversion of magnetic diameter distribution of magnetic fluids under high and low temperatures

“…The unique structural characteristics of magnetic fluids endow them with distinctive physical properties, including superparamagnetism [2], magnetization [3], magneto-viscous property [4], magnetooptical property [5], and magneto-thermal property [6]. The natural advantages have led to the extensive utilization of magnetic fluids in various applications such as seal [7], dampers [8], energy harvesters [9], and magnetic hyperthermia [10]. Considering magnetic fluids as two-phase mixed media, precise characterization of MNPs size holds paramount importance.…”