Portable Self-Powered Piezoelectric Nanogenerator and Self-Charging Photo-Power Pack Using In Situ Formed Multifunctional Calcium Phosphate Nanorod-Doped PVDF Films

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Abstract
Herein, biocompatible Ca3(PO4)2 nanorods incorporated poly(vinylidene) difluoride films have been prepared via in situ process. A good piezoelectricity ( d33 ~ 56.6 pC/N) along with large dielectric constant ~ 3.48 x 105 at frequency 20 Hz has been achieved. Then we have designed biocompatible, highly durable, low cost piezoelectric nanogenerator (CPNG) which shows the superiority in open circuit voltage ~ 47 V and current ~ 1.8 µA generation with power density ~ 47.4 mWcm-¬3 under gentle touch of finger. Excellent mechanical to electrical energy conversion efficiency (~ 65.5 %) of our developed CPNG leads to fast charging a capacitor of 1 µF in 18 s and glowing up 26 LEDs under finger impartation. Further, a portable light charging power pack (LCPP) has been developed using the high dielectric film as storage function. Under light illumination our LCPP generate open circuit output voltage ~ 1.29 volt with short circuit current 5.7 mAcm-2. Areal capacitance ~ 1779 Fm-2 and storage efficiency ~ 88 % are achieved. The device is able to lighten up 22 LEDs for 10 days after charging by once.
Funding Information
  • University Grants Commission

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