首页|Piezoelectric nanogenerator based on lead-free BiFeO3:Sr perovskite
Piezoelectric nanogenerator based on lead-free BiFeO3:Sr perovskite
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NSTL
Elsevier
? 2022 Elsevier B.V.The current work reports the synthesis of Bi1?xSrxFeO3 (SBFO; x = 0.0, 0.15, 0.25, 0.35) nanoparticles by sol-gel method and study of its structural and piezoelectric properties. X-ray diffraction identifies the phase transformation from rhombohedral to cubic of BiFeO3 upon doping of Sr. X-ray photoemission spectroscopy revealed that Sr doped BiFeO3 nanoparticles are rich with oxygen vacancies compared to the bare BiFeO3 nanoparticles. The highest maximal polarization value of 6.74 μC cm?2 and remnant polarization 4.20 μC cm?2 are observed for BiFeO3 with 25% of Sr. The SBFO-PENG with 25% of Sr content device provides output voltage and current of 6.35 V and 0.64 μA under pushing tester with 1 Hz frequency, which is higher to that for a bare BiFeO3 PENG. It also exhibits high mechanical robustness, and much stable and durable output even after 1500 s. A maximum power density of ~ 0.31 μWcm?2 was achieve at a resistive load of 108 Ω. The SBFO-PENG device's feasibility is tested by trigging commercial electronics such as charging capacitors and lighting the LED, and it can drive a 0.47 μF capacitor to store the energy of 7.29 μJ within 500 s under pushing tester.
NSTL
Elsevier
