한국군사과학기술학회지 (Journal of the Korea Institute of Military Science and Technology)

  • 제18권2호
  • /
  • Pages.139-145
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  • 2015
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  • 1598-9127(pISSN)
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  • 2636-0640(eISSN)
한국군사과학기술학회 (The Korea Institute of Military Science and Technology)
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티탄산바륨 덴드라이트 나노구조체 기반 플렉서블 압전 나노발전소자

Flexible Piezoelectric Nanocomposite Generator Devices based on BaTiO3 Dendrite Nanostructure

  • 배수빈 (국방과학연구소 제4기술연구본부)
  • Bae, Soo Bin (The 4th Research and Development Institute, Agency for Defense Development)
  • 투고 : 2014.08.20
  • 심사 : 2015.02.27
  • 발행 : 2015.04.05
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초록

In this paper, the flexible piezoelectric nanocomposite generator(NCG) device based on $BaTiO_3$ nanostructures was fabricated via simple and low-cost spin coating method. The $BaTiO_3$ nanostructures synthesized by self-assembly reaction showed dendrite morphologies. To produce the piezoelectric nanocomposite(p-NC layer) which acts as an electric energy source in NCG device, the piezoelectric nanopowders($BaTiO_3$) were dispersed in polydimethylsiloxane(PDMS). Sequently, the p-NC layer was inserted in two dielectric layer of PDMS; these layers enabled the NCG device flexibility as well as durability prohibiting detachment(exfoliation) for significantly mechanical bending motions. The fabricated NCG device shows average maximum open circuit voltage of 6.2 V and average maximum current signals of 300 nA at 20 wt% composition of $BaTiO_3$ nanostructures in p-NC layer. Finally, the flexible energy harvester generates stable output signals at any rate of frequency which were used to operate LCD device without any external energy supply.

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