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High-performance nanogenerators based on flexible cellulose nanofibril/MoS2nanosheet composite piezoelectric films for energy harvesting
- Source :
- Nano Energy; February 2021, Vol. 80 Issue: 1
- Publication Year :
- 2021
-
Abstract
- High-performance and environment-friendly biomass-based piezoelectric films have drawn much attention recently. Here, 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO)-oxidized cellulose nanofibril (TOCN)/molybdenum disulfide (MoS2) nanosheet bionanocomposite piezoelectric films were prepared through an environmentally benign pathway by aqueous dispersion. The TOCN/MoS2nanocomposite films exhibited good mechanical properties with the highest Young’s modulus of 8.2 GPa and tensile strength of 307 MPa. When the MoS2content was 4 wt%, the longitudinal piezoelectric constant (d33) of the composite film reached a maximum value of 31 pC/N, much higher than 12 pC/N of the neat TOCN film and other reported cellulose-based piezoelectric films. Moreover, nanogenerators fabricated from TOCN/MoS2composite films exhibited a maximum output voltage of 4.1 V and a short-circuit current of 0.21μA. Furthermore, the current generated by the nanogenerator was rectified and converted to direct current. A 10μF commercial capacitor was charged to 1.6 V at 120 s, indicating the ability to collect mechanical energy generated in the natural environment. Therefore, the TOCN/MoS2composite films are promising in the field of piezoelectric materials and nanogenerators.
Details
- Language :
- English
- ISSN :
- 22112855
- Volume :
- 80
- Issue :
- 1
- Database :
- Supplemental Index
- Journal :
- Nano Energy
- Publication Type :
- Periodical
- Accession number :
- ejs54527391
- Full Text :
- https://doi.org/10.1016/j.nanoen.2020.105541