Enhanced output performance of a lead-free nanocomposite generator using BaTiO 3 nanoparticles and nanowires filler

Changyeon Baek, Jong Hyuk Yun, Hee Seung Wang, Ji Eun Wang, Hyeonbin Park, Kwi Il Park, Do Kyung Kim

Research output: Contribution to journalArticlepeer-review

47 Scopus citations

Abstract

Flexible nanocomposite generators based on piezoelectric nanoparticles (NPs)-polymeric matrix have been attracted attention as the energy harvesting device converted the electricity from the mechanical deformations. To enhance the piezo-potential difference introduced inside the piezoelectric nanocomposite, one-dimensional nanostructures such as CNTs, copper nanorods, and Ag nanowires (NWs) should be used inevitably as a dispersing agent for achieving well-distributed piezoelectric nanoparticles in an elastomer. These non-piezoelectric additives showed versatile roles; however, their toxicity to living organism has been an obstacle to realize the bio-eco-friendly flexible energy harvesters. Replacing them with piezoelectric NWs with non-toxic can be a challengeable approach to achieve not only the original purposes of additives but also the improvement of output performance. Here, we synthesized well-crystallized BaTiO 3 spherical and acicular NPs via a simple hydrothermal reaction and the two-step hydrothermal reactions, respectively and produced piezoelectric nanocomposite made of piezoelectric BaTiO 3 NPs and NWs without toxic dispersion enhancers. Output performance of the fabricated flexible energy harvesters with varying the composition of NPs and NWs were investigated by the well-optimized measurement system during the periodical bending and unbending. A nanocomposite-based energy harvester with 4:1 wt ratio generated the maximum open-circuit voltage and short-circuit current of 60 V and 1.1 μA, respectively.

Original languageEnglish
Pages (from-to)164-170
Number of pages7
JournalApplied Surface Science
Volume429
DOIs
StatePublished - 31 Jan 2018

Keywords

  • 0-Dim & 1-Dim nanoparticle
  • BaTiO
  • Energy harvesting
  • Hydrothermal

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