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A Universal Strategy for Improving the Energy Transmission Efficiency and Load Power of Triboelectric Nanogenerators

机译：提高摩擦电纳米发电机能量传输效率和负载功率的通用策略

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摘要

Triboelectric nanogenerators (TENGs) have recently been invented as a potential energy technology for harvesting low-frequency mechanical energy. The load power acquired from a TENG is far less than the maximum output power of the TENG for the large internal impedance and impedance mismatch, and this difference results in an extremely low energy transmission efficiency. Here, a universal strategy is proposed for improving the energy transmission efficiency and load power through dielectric material design, including a reduction in the effective thickness and the directional alignment of the electric dipole. This strategy reduces the internal impedances of TENGs with different modes and results in the improvement of energy transmission efficiency and load power. According to this strategy, the internal impedance of an as-fabricated TENG is reduced from 16 to 1.3 M omega, and the energy transmission efficiency is enhanced from 22.46% to 99.5%. Moreover, the load power under 1 M omega resistance is improved from 0.014 to 0.251 mu W, an increase of 18 times. The strategy not only opens a universal and new road to power management, but also paves the way for the industrial applications of TENGs.
机译：摩擦电纳米发电机（TENGs）最近被发明为一种潜在的能源技术，用于收集低频机械能。对于较大的内部阻抗和阻抗失配，从TENG获得的负载功率远小于TENG的最大输出功率，这种差异导致能量传输效率极低。在此，提出了一种通用策略，旨在通过介电材料设计提高能量传输效率和负载功率，包括减小有效厚度和电偶极子的方向对准。这种策略降低了具有不同模式的TENG的内部阻抗，从而提高了能量传输效率和负载功率。根据该策略，制成的TENG的内部阻抗从16MΩ降低到1.3 MΩ，能量传输效率从22.46％提高到99.5％。此外，在1 MΩ电阻下的负载功率从0.014改善到0.251μW，增加了18倍。该策略不仅为电源管理开辟了一条通用的新道路，而且为TENG的工业应用铺平了道路。

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