High-Performance Organic–Inorganic Hybrid Piezo-Nanogenerator via Interface Enhanced Polarization Effects for Self-Powered Electronic Systems

摘要

An electrospun fiber based wearable organic–inorganic hybrid piezo-nanogenerator compose of suitably engineered P(VDF-TrFE) and BaTiO_3 nanostructures is reported. In the case of the device with an electrospun mat of piezoelectric β-phase P(VDF-TrFE) and BaTiO_3 nanoparticulates filled in the interfiber open spaces, a power density of 16 μW cm~(?2) is realized at an applied impact of 0.02 MPa (which essentially corresponds to the thumb pressure). A similar device, with BaTiO_3 additionally embedded in the P(VDF-TrFE) fibers during their formation, renders a significantly higher peak power density of 28 μW cm~(?2) with instantaneous power density of ≈8.8 μW cm~(?2) at the same touch pressure. This performance is attributed to the high density of interfaces in such a device and the corresponding enhancement in the dielectric response. It is demonstrated that the power generated from such a hybrid device structure can be used for small scale applications such as charging a mobile phone.