DEVELOPMENT OF DIRECT CURRENT TRIBOELECTRIC NANOGENERATOR

The present work proposes five types of DC TENG based on electrostatic breakdown to generate direct current to be applied in small electronic appliances. Triboelectric nanogenerator (TENG) is a technology that combines electrostatic induction and triboelectrification to harvest energy. The output of the TENG is an alternating current (AC) that needs a rectifier to obtain a direct current (DC). Recently, direct current triboelectric nanogenerator DC TENG has been developed based on the combination of triboelectrification and electrostatic breakdown. The present work proposes five types of DC TENG to generate direct current to be applied in small electronics. It was revealed that the voltage harvested by the DC-TENG resulted from the triboelectrification and electrostatic breakdown and generated direct current passed through the electrodes and Al surface. It was observed that voltage displayed maximum values at a certain value of the contact area of the electrodes. When Cu electrodes were replaced by Al ones, voltage showed higher voltage at the controlled length of the electrodes. Besides, the oily sliding of Cu on PTFE displayed a drastic voltage decrease, while the oily sliding of Cu on Kapton increased the voltage. Water-wet sliding of Al on PTFE showed higher voltage values than the dry one. While, Al sliding on PMMA at water conditions presented a remarkable voltage increase, especially for the connected two electrodes.