Investigating the role of chalcogen atom in the piezoelectric performance of PVDF/TMDCs based flexible nanogenerator

Vishal Singh, Deshraj Meena, Himani Sharma, Ashutosh Trivedi and Bharti Singh

Energy, 2022, vol. 239, issue PB

Abstract: The current work shows first of its kind, where the systematic effect of the chalcogen atom of the Transition metal dichalcogenides (TMDCs) (MoS2, MoSSe, MoSe2) and polyvinylidene fluoride (PVDF) based composites on the piezoelectric performance of the fabricated piezonanogenerator has been investigated. Flexible PVDF/TMDCs composite thin films have been synthesized to check the effect of TMDCs as a filler in the PVDF matrix. Raman and FTIR spectroscopy revealed the enhancement of piezoelectric behavior due to increase in the polar β-phase content of PVDF after addition of TMDCs in PVDF. Out of all the fabricated piezonanogenerator, the PVDF/MoSSe based nanogenerator showed the maximum peak to peak open circuit voltage of 31.2 V and short circuit current of 1.26 μA. This enhancement was achieved just by adding TMDCs without any further treatment. The enhanced piezoelectric performance is attributed to the synergistic contributions from inherent piezoelectricity of synthesized TMDCs and intensified β-phase for the PVDF/TMDCs composites. The highest output voltage for the PVDF/MoSSe device is ascribed to the lack of reflection symmetry in MoSSe structure. The generated voltage was also used for lightning a commercial LED and for charging of a capacitor of 4.7 μF.

Keywords: Piezoelectricity; PVDF; Transition metal dichalcogenides; MoSSe; Piezonanogenerator; Thin films (search for similar items in EconPapers)
Date: 2022
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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:239:y:2022:i:pb:s0360544221023732

DOI: 10.1016/j.energy.2021.122125

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