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

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Abstract
An electrospun fiber based wearable organic–inorganic hybrid piezo‐nanogenerator compose of suitably engineered P(VDF‐TrFE) and BaTiO3 nanostructures is reported. In the case of the device with an electrospun mat of piezoelectric β‐phase P(VDF‐TrFE) and BaTiO3 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 BaTiO3 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.

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