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A Flexible Piezoelectric Energy Harvester-Based Single-Layer WS 2 Nanometer 2D Material for Self-Powered Sensors

Author

Listed:
  • Quan Wang

    (Department of Electrical Engineering, Hanyang University, Seoul 133-791, Korea
    Contributed equally to this work.)

  • Kyung-Bum Kim

    (Department of Electrical Engineering, Hanyang University, Seoul 133-791, Korea
    Contributed equally to this work.)

  • Sang Bum Woo

    (Department of Electrical Engineering, Hanyang University, Seoul 133-791, Korea
    Contributed equally to this work.)

  • Yoo Seob Song

    (Department of Civil Engineering, The University of Texas Rio Grande Valley, Edinburg, TX 78539, USA)

  • Tae Hyun Sung

    (Department of Electrical Engineering, Hanyang University, Seoul 133-791, Korea)

Abstract

A piezoelectric sensor is a typical self-powered sensor. With the advantages of a high sensitivity, high frequency band, high signal-to-noise ratio, simple structure, light weight, and reliable operation, it has gradually been applied to the field of smart wearable devices. Here, we first report a flexible piezoelectric sensor (FPS) based on tungsten disulfide (WS 2 ) monolayers that generate electricity when subjected to human movement. The generator maximum voltage was 2.26 V, and the produced energy was 55.45 μJ of the electrical charge on the capacitor (capacity: 220 μF) when applying periodic pressing by 13 kg. The generator demonstrated here can meet the requirements of human motion energy because it generates an average voltage of 7.74 V (a knee), 8.7 V (a sole), and 4.58 V (an elbow) when used on a running human (weight: 75 kg). Output voltages embody distinct patterns for different human parts, the movement-recognition capability of the cellphone application. This generator is quite promising for smart sensors in human–machine interaction detecting personal movement.

Suggested Citation

  • Quan Wang & Kyung-Bum Kim & Sang Bum Woo & Yoo Seob Song & Tae Hyun Sung, 2021. "A Flexible Piezoelectric Energy Harvester-Based Single-Layer WS 2 Nanometer 2D Material for Self-Powered Sensors," Energies, MDPI, vol. 14(8), pages 1-14, April.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:8:p:2097-:d:533074
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    References listed on IDEAS

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    1. Wenzhuo Wu & Lei Wang & Yilei Li & Fan Zhang & Long Lin & Simiao Niu & Daniel Chenet & Xian Zhang & Yufeng Hao & Tony F. Heinz & James Hone & Zhong Lin Wang, 2014. "Piezoelectricity of single-atomic-layer MoS2 for energy conversion and piezotronics," Nature, Nature, vol. 514(7523), pages 470-474, October.
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