Preparation and properties of triboelectric nanogenerator based on PVDF-TrFE/PMMA electrospun film

With the emergence of the era of Internet of things, traditional batteries have been challenged by environmental pollution, replacement maintenance, and other problems, and the self-power technology of flexible electronic devices has received great attention. PVDF-TrFE is one of the commonly used materials for triboelectric nanogenerators (TENG) because of its high β-phase ratio and strong electron attraction ability. Electrospinning technology can further increase the proportion of β-phase in PVDF-TrFE by electric field polarization. However, the electrospun PVDF-TrFE fiber film has poor mechanical properties and is difficult to be used in electronic devices for a long time. The addition of PMMA can form hydrogen bonds in the fiber, which greatly optimizes the mechanical strength of the blended film. Therefore, in this work, PVDF-TrFE/PMMA electrospun film with mechanical and electrical stability was prepared by electrospinning method. After optimization of materials and working conditions, the optimal output performance of the hybrid membrane TA-TENG can reach 0.215 μA and 210 V. Over 2000 working cycles, the device offers excellent output stability and long-term durability. This study presents a novel approach to concurrently enhance both the electrical and mechanical properties of triboelectric materials, thereby broadening their applicability in everyday life.