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Open AccessArticle

Dry-Coated Graphite onto Sandpaper for Triboelectric Nanogenerator as an Active Power Source for Portable Electronics

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Department of Electronics, Yuvaraja’s College, University of Mysore, Mysuru 570005, Karnataka, India
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Department of Studies in Physics, University of Mysore, Mysuru 570006, Karnataka, India
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Shenzhen Key Laboratory of Nanoimprint Technology, Department of Materials Science and Engineering, Southern University of Science and Technology (SUSTech), Shenzhen 518055, China
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Guangdong Provincial Key Laboratory of Energy Materials for Electric Power, Shenzhen 518055, China
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Centre for Materials Science and Technology, Vijnana Bhavan, University of Mysore, Manasagangotri, Mysore 570006, India
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Department of Mechanical Engineering, National University of Singapore, Singapore 117576, Singapore
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School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China
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School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China
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Authors to whom correspondence should be addressed.
Nanomaterials 2019, 9(11), 1585; https://doi.org/10.3390/nano9111585 (registering DOI)
Received: 18 October 2019 / Revised: 2 November 2019 / Accepted: 4 November 2019 / Published: 8 November 2019
Developing an eco-friendly, flexible and recyclable micro-structured dry electrode for sustainable life is essential. In this work, we have developed irregular, micro-structured sandpaper coated with graphite powder as an electrode for developing a simple, low-cost, contact-separation mode graphite-coated sandpaper-based triboelectric nanogenerator (GS-TENG) as a self-powered device and biomechanical sensor. The as-fabricated GS-TENG is a dielectric-conductor model. It is made up of a bottom layer with polytetrafluoroethylene (PTFE) as a triboelectric layer, which is attached onto a graphite-coated sandpaper-based electrode and a top layer with aluminum as another triboelectric layer as well as an electrode. The forward and reverse open-circuit voltages reach upto ~33.8 V and ~36.62 V respectively, and the forward and reverse short-circuit currents are ~2.16 µA and ~2.17µA, respectively. The output generated by GS-TENG can power 120 blue light-emitting diodes connected in series, liquid crystal display and can charge commercial capacitors along with the rectifier circuit. The capacitor of 22 µF is charged upto 5 V and is sufficient to drive digital watch as wearable electronics. Moreover, the device can track signals generated by human motion, hence it scavenges biomechanical energy. Thus, GS-TENG facilitates large-scale fabrication and has potential for future applications in wearable and portable devices. View Full-Text
Keywords: graphite; sandpaper; flexible dry electrode; biomechanical sensor graphite; sandpaper; flexible dry electrode; biomechanical sensor
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MDPI and ACS Style

Ankanahalli Shankaregowda, S.; Sagade Muktar Ahmed, R.F.; Liu, Y.; Bananakere Nanjegowda, C.; Cheng, X.; Shivanna, S.; Ramakrishna, S.; Yu, Z.; Zhang, X.; Sannathammegowda, K. Dry-Coated Graphite onto Sandpaper for Triboelectric Nanogenerator as an Active Power Source for Portable Electronics. Nanomaterials 2019, 9, 1585.

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