Lead-free linbo3 nanowire-based nanocomposite for piezoelectric power generation

Byung Kil Yun, Yong Keun Park, Minbaek Lee, Nuri Lee, William Jo, Seongsu Lee, Jong Hoon Jung

Research output: Contribution to journalArticlepeer-review

58 Scopus citations

Abstract

In a flexible nanocomposite-based nanogenerator, in which piezoelectric nanostructures are mixed with polymers, important parameters to increase the output power include using long nanowires with high piezoelectricity and decreasing the dielectric constant of the nanocomposite. Here, we report on piezoelectric power generation from a lead-free LiNbO3 nanowire-based nanocomposite. Through ion exchange of ultra-long Na2Nb2O6-H2O nanowires, we synthesized long (approximately 50 μm in length) single-crystalline LiNbO3 nanowires having a high piezoelectric coefficient (d33 approximately 25 pmV-1). By blending LiNbO3 nanowires with poly(dimethylsiloxane) (PDMS) polymer (volume ratio 1:100), we fabricated a flexible nanocomposite nanogenerator having a low dielectric constant (approximately 2.7). The nanogenerator generated stable electric power, even under excessive strain conditions (approximately 105 cycles). The different piezoelectric coefficients of d33 and d31 for LiNbO3 may have resulted in generated voltage and current for the e33 geometry that were 20 and 100 times larger than those for the e31 geometry, respectively. This study suggests the importance of the blending ratio and strain geometry for higher output-power generation in a piezoelectric nanocomposite-based nanogenerator.

Original languageEnglish
Article number4
Pages (from-to)1-7
Number of pages7
JournalNanoscale Research Letters
Volume9
Issue number1
DOIs
StatePublished - 2014

Keywords

  • High and stable electric power
  • Nanocomposite nanogenerator

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