Human motion interactive mechanical energy harvester based on all inorganic perovskite-PVDF

Piezoelectric Nanogenerator Based on In Situ Growth All‐Inorganic CsPbBr3 Perovskite Nanocrystals in PVDF Fibers with Long‐Term Stability

“…The XRD patterns of untreated PVDF fibers reveal two peaks, (020) and (110) at 18.15° and 19.97°, indicating that the α‐phase is the dominant crystalline phase. After heat treatment (Figure 3a), the peak at 19.97° moves to a larger angle of about 20.24°, [ 13 ] indicating the semi‐crystalline β‐phase of PVDF domains after thermal annealing treatment.…”

“…[ 11 ] ii) Synergistic effect of PVDF and CsPbBr 3 : First, the presence of CsPbBr 3 in PVDF increases overall crystallinity of the composite due to the interaction between perovskite and PVDF induce high yield of the β phase. [ 13 ] The reason is that the electroactive β‐phase of PVDF is nucleated by the presence of inorganic nanoparticles using surface electrostatic interaction. [ 18 ] Second, the stiff PVDF polymer can effectively reinforce the stress applied to the dispersed piezoelectric CsPbBr 3 NCs because of the higher Young's modulus of PVDF, that is, 2–2.90 GPa.…”

Recent advances in hybrid perovskite nanogenerators

“…80 In addition, all-inorganic CsPbBr 3 perovskite rods inside PVDF nanofibers enabled over 90% nucleation of electroactive β-phase in PVDF, making them more suitable for PENGs. 81 At last, we recommend the work by Pandey et al who provided the microscopic origin of piezoelectricity in lead-free FASnI 3 perovskites using first-principles calculations. 82 The soft elastic nature and soft polar optic phonons were suggested to be responsible for the high piezoelectric response of FASnI 3 .…”

“…On account of the superior electroactive properties of the MAPbI 3 ‐PVDF composite nanofibers (Figure 3F), Sultana et al demonstrated a piezoelectric‐pyroelectric PENG with output power densities of about 0.8 and 0.2 mW/m 2 under mechanical vibration and temperature fluctuation, respectively 80 . In addition, all‐inorganic CsPbBr 3 perovskite rods inside PVDF nanofibers enabled over 90% nucleation of electroactive β ‐phase in PVDF, making them more suitable for PENGs 81 . At last, we recommend the work by Pandey et al who provided the microscopic origin of piezoelectricity in lead‐free FASnI 3 perovskites using first‐principles calculations 82 .…”

Portable and wearable self-powered systems based on emerging energy harvesting technology

“…Therefore, triboelectric 15,16 , piezoelectric 17,18 , and electromagnetic 19,20 energy harvesters are suitable for harvesting mechanical energy during human motion. Biofuel cells use enzymes or microbes as catalysts to convert chemical energy into electrical energy.…”