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As the foundation of intelligent cities, many intelligent sensors require energy to support their work, such as batteries. Harnessing energy from the environment or human movement is a viable solution to this issue. The device which collects this part of energy and convert it into electric energy, can supply electricity to electrical appliances. This research proposes a human kinetic energy collection device based on a direct current triboelectric nanogenerator. Compared to the traditional TENG, the spinning energy collector triboelectric nanogenerator (SEC-TENG) can directly output direct current without a rectifier unit. By combining the SEC-TENG with the rack and pinion mechanism, the vertical motion can convert into rotary motion to drive the SEC-TENG to generate electric energy. The best-matched impedance of the device is 1 MΩ, and the device has a power generation performance of 450 V open circuit voltage and 11 µA short circuit current at a rotational speed of 300 r/min. The device can collect the kinetic energy of human footsteps and pedaling actions as a power generation roadbed, which provides electricity to the sensors on the roadside. It provides a potential energy supply plan for constructing intelligent cities.

A power generation roadbed based on direct current triboelectric nanogenerators for human kinetic energy harvesting