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International Conference on Mechanical, Materials and Renewable Energy IOP Publishing IOP Conf. Series: Materials Science and Enginee1ri2n3g4357678(920‘1’8“)” 012186 doi:10.1088/1757-899X/377/1/012186 An experiment can be performed in which electrostatic charging occurs when two different materials come in contact and are then separated. According to the results, material selection of the footwear and the flooring surface is the decisive factor for the polarity and the amount of charge build-up while walking on the floor. For humans, the threshold of sensing an electrical discharge is about 2 kV of body voltage and from 4 to 6 kV above it gives pain. The maximum output voltage measured during walking test on the laminate floorings is found to be 12 kV. Adding antistatic additives to cleaning liquids can eliminate the problem of static electricity [8]. Hou et al. experimentally analyzed and optimised the energy generation through the foot-fall energy. A shoe sole can be fabricated using the triboelectric materials where spacers can be placed between them. Elastic sponge is used as the spacer, where the size and the thickness of the spacer effectively affected the output. The device was capable of converting the human walking energy to electrical energy and can light up 30 LEDs in serial connection. From the results it was observed that with the increase in the number of spacers the voltage and the current density decreases due to small effective contact area [9]. A large area intelligent power floor (LIPF) can be prepared on the concept of single electrode TENG. When two surfaces come in close contact and are separated, then negative charges are produced on the PVC surface and positive charges are induced on the copper film, resulting in power generation. With the increase in impact force between the triboelectric materials there is a significant increase in the efficiency of the TENG. Another observation was made by keeping the PVC flooring and TENG in the indoor air for ten days and noticed a significant increase in proportion of dust collection for the TENG as compared to blank floor. This proves the capability of the TENG to be used for dust removal and air purification [10]. 2.1.4 TENG driven by Magnetic force and fingertip pressure Taghavi et al. designed a typical contact key based TENG, driven by the magnetic force and fingertip pressure mechanism which is shown in figure 3. 4PDF Image | Critical Review on Triboelectric Nanogenerator
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