Journal of Tropical Oceanography >
Spring-assisted triboelectric nanogenerator for shore-based ocean wave energy harvesting
Copy editor: YAO Yantao
Received date: 2022-09-23
Revised date: 2022-10-26
Online published: 2022-12-06
Supported by
National Natural Science Foundation of China(42222606)
National Natural Science Foundation of China(62103400)
National Natural Science Foundation of China(42211540003)
National Key R&D Program of China(2021YFC3101300)
Independent Project Deployed by Innovative Academy of Marine Information Technology of CAS(CXBS202103)
As one of the most important renewable energy sources, ocean wave energy is inexhaustible and has broad development potential. Herein, we propose a novel spring-assisted triboelectric nanogenerator (SS-TENG) for harvesting shore-based wave energy. SS-TENG realizes ocean wave energy conversion through the “wave-floating platform-spring” transmission structure, which avoids direct contact with seawater and minimizes the damage to the power generation module caused by a corrosive environment. The output performance of SS-TENG is significantly enhanced in two ways. First, by utilizing the elastic potential energy released by the spring, the instantaneous contact speed between the electrode and dielectric layer is boosted, and the peak current (IP) output by a single triboelectric nanogenerator (TENG) unit increases from 7.36 to 12.12 μA. Second, benefiting from the synchronous movement of each TENG unit, the TENGs can be connected in parallel to achieve the linear increase of IP from 12.12 μA for a single unit to 43.86 μA for four units. SS-TENG can provide sufficient energy to drive a digital calculator and up to 160 high luminosity LEDs, verifying its superior performance. The proposed design has the merits of modest structure, low production cost, excellent output performance, and long-term stability, and is expected to inspire the development of shore-based wave energy generators and self-sufficient ocean sensors.
XU Qingyue , PAN Yuanchao , MA Haoxiang , LI Changzheng , LIU Weihao , XUE Liang , HAN Changbao , YANG Yang . Spring-assisted triboelectric nanogenerator for shore-based ocean wave energy harvesting[J]. Journal of Tropical Oceanography, 2023 , 42(4) : 176 -183 . DOI: 10.11978/2022200
图3 SS-TENG输出性能的优化a. 弹簧的有无对单个TENG单元的输出电压; b. 电流的影响; c. 弹簧的有无对单个TENG单元的IP的影响; d. 不同数量的TENG单元依次并联后输出的电压; e. 不同数量的TENG单元依次并联后输出的电流; f. 不同数量的TENG单元并联后输出的IP Fig. 3 Structural optimization of SS-TENG. (a) The output voltage, and (b) current of a single TENG unit with or without spring; (c) The output IP of a single TENG unit with or without spring; (d) The output voltage, and (e) current of different numbers of TENG units in parallel; (f) The output IP generated by different numbers of TENG units in parallel |
图4 SS-TENG的输出性能表现a. 不同频率下单个TENG单元的输出电压; b. 不同频率下单个TENG单元的输出电流; c. 不同振幅下单个TENG单元的输出电压; d. 不同振幅下单个TENG单元的输出电流; e. SS-TENG的输出电压、电流随外电阻变化的曲线; f. SS-TENG的输出功率随外电阻变化的曲线 Fig. 4 Output performance of SS-TENG. (a) The output voltage, and (b) current of a single TENG unit with different frequencies; (c) The output voltage, and (d) current of a single TENG unit with different amplitudes; (e) Curves of the output voltage, current, and (f) the power of SS-TENG with different external resistance |
图5 SS-TENG的充电性能a. 采用串联或并联连接的SS-TENG给2.2μF电容器充电时的电压; b. 采用并联连接的SS-TENG给不同电容器充电时的电压 Fig. 5 Charging performance of SS-TENG. (a) The voltage of a 2.2 µF capacitor charging by SS-TENG connected in parallel and in series; (b) The voltage of various capacitors charging by SS-TENG connected in parallel |
图6 SS-TENG的应用测试a. 使用SS-TENG点亮160盏LED灯; b. SS-TENG为计算器充电时的工作电路; c. SS-TENG给100µF电容器充电以及连接计算器后的放电过程 Fig. 6 Applications of SS-TENG. (a) 160 LEDs are lighted up by SS-TENG; (b) The working circuit diagram of SS-TENG for powering a calculator; (c) The process of charging a 100 μF capacitor by SS-TENG and the discharging process after connecting the calculator |
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