Wearable triboelectric nanogenerator using a plasma-etched PDMS-CNT composite for a physical activity sensor

Min Ki Kim, Myoung Soo Kim, Hong Bum Kwon, Sung Eun Jo, Yong Jun Kim

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Triboelectric nanogenerators (TENGs) have recently shown promising potential as effective energy harvesters using human motion energy. However, the efficiency of polymer-based flexible TENG must be enhanced for various applications. In this work, we propose a flexible TENG with a fluorocarbon plasma-etched polydimethylsiloxane (PDMS)-carbon nanotube (CNT). The fluorocarbon plasma etching causes not only a chemical modification, but also a physical effect on the morphology of the PDMS-CNT surface to enhance the TENG output performance. The added CNT enhances the mechanical properties, such as durability, of a thin film. The etched PDMS structure and the revealed CNTs increase the charge density on the surface. We confirm the effect of different CNT concentrations doped in PDMS and various etching times. We propose a TENG with 4 wt% CNT, which has been subjected to fluorocarbon etching for 60 s. The TENG exhibits an output voltage of 77.8 V, which is 248.7% and 106.5% higher than that of pure PDMS and un-etched PDMS-CNT, respectively. The 20 mm × 30 mm TENG delivers an output power of 1.98 mW (3.29 W m-2) at a matching resistance of 3 MΩ. The TENG exhibits good stability and superior electrical performance, making it capable of driving both the instantaneous operation of 70 LEDs and the charging of a 0.33 μF capacitor to 6.6 V. Furthermore, this TENG can be used as a self-powered physical activity sensor that measures the amount of human activity through the amount of charge in the capacitor.

Original languageEnglish
Pages (from-to)48368-48373
Number of pages6
JournalRSC Advances
Volume7
Issue number76
DOIs
Publication statusPublished - 2017 Jan 1

Fingerprint

Carbon Nanotubes
Polydimethylsiloxane
Carbon nanotubes
Plasmas
Fluorocarbons
Sensors
Composite materials
Etching
Capacitors
Harvesters
Plasma etching
Chemical modification
Charge density
Light emitting diodes
baysilon
Polymers
Durability
Thin films
Mechanical properties
Electric potential

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)

Cite this

Kim, Min Ki ; Kim, Myoung Soo ; Kwon, Hong Bum ; Jo, Sung Eun ; Kim, Yong Jun. / Wearable triboelectric nanogenerator using a plasma-etched PDMS-CNT composite for a physical activity sensor. In: RSC Advances. 2017 ; Vol. 7, No. 76. pp. 48368-48373.
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Wearable triboelectric nanogenerator using a plasma-etched PDMS-CNT composite for a physical activity sensor. / Kim, Min Ki; Kim, Myoung Soo; Kwon, Hong Bum; Jo, Sung Eun; Kim, Yong Jun.

In: RSC Advances, Vol. 7, No. 76, 01.01.2017, p. 48368-48373.

Research output: Contribution to journalArticle

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AU - Kim, Min Ki

AU - Kim, Myoung Soo

AU - Kwon, Hong Bum

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AU - Kim, Yong Jun

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