All-fiber acousto-electric energy harvester from magnesium salt-modulated PVDF nanofiber

摘要: In this work, an all-fiber acoustoelectric nanogenerator (AAPNG) is fabricated by the hydrated metal salt (MgCl2·6H2O) (Mg-salt) reinforced polyvinylidene fluoride (PVDF–Mg) nanofibers as active layer and interlocked conducting micro-fiber-based electrode for converting mechanical acoustic energies into useful electrical power. It has been found that electroactive phase content (∼84%) enhanced in PVDF–Mg due to inter-molecular H-bonding moieties, arrangement of macromolecular chains (PVDF) a layer-by-layer fashion, existence interfacial interaction between Mg-salt dimethylformamide (DMF) resonance structure –CF2 dipoles PVDF. As result, possess superior piezoelectric charge coefficient (d33 ≈ 33.6 pC N−1) figure merit (FoM 12.7 × 10−12 Pa−1) with respect neat PVDF 22 N−1 FoM 9.7 Pa−1). Benefitting from ultrafast response time ∼6 ms, AAPNG serves sensor detecting low-frequency sound sensitivity (Sa) 10 V Pa−1, which (Sa ∼ 266 mV With overall energy conversion efficiency ∼1.3%, powers range commercial electronic gadgets, such LEDs, capacitors, LCDs. This makes it perfectly suitable noise detection purposes well self-powered microphone applications. Additionally, AAPNGs can be realized human motion monitoring systems, finger sensors pave way futuristic robotic-based