Journal
ADVANCED MATERIALS TECHNOLOGIES
Volume 4, Issue 8, Pages -Publisher
WILEY
DOI: 10.1002/admt.201900228
Keywords
BaTiO3; energy harvesting; nanowire array; piezoelectric
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Funding
- National Research Foundation of Korea (NRF) - Ministry of Science and ICT (MSIT) [NRF-2016R1C1B1006456, NRF-2018R1A4A1022260]
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Energy conversion based on vertically aligned piezoelectric nanowire (NW) arrays is of great interest because of their unusual properties originating from large surface area/high aspect ratio and excellent piezoelectric properties. Here, perovskite-structured piezoelectric BaTiO3 NW arrays are vertically grown onto the flexible Ti substrates by a two-step hydrothermal reaction to realize an aligned 1D nanostructures-based flexible energy harvester. The BaTiO3 NW array-based flexible piezoelectric energy harvester (PEH) successfully converts a maximum open-circuit voltage of approximate to 15 V, a maximum short-circuit current of approximate to 400 nA, and an effective power of approximate to 0.27 mu W during repeated bending deformations. Under pressing with an external force of 49.57 N, the harvested output signals of the vertically aligned NW arrays-based PEH are approximate to 20 V and approximate to 60 nA. Finite element analysis with multiphysics simulation supports the hypothesis of effective potential generation by the NW arrays-based flexible PEH. These results can aid in the further development of high-output 1D nanostructures-based flexible PEHs.
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