【摘要】 杂化有机-无机压电材料因其电光性能优异、合成简单以及机械柔性等优点而受到广泛关注,在能源和传感领域显示出巨大的应用潜力.本文合成了一例新的零维杂化压电材料[Me-V]₃Mn（SCN）₅,并与聚己二酸丁二酯对苯二甲酸丁二酯复合成膜制备了用于机械能收集的压电器件.实验结果表明,15 wt%组分的压电器件具有优异的能量收集性能,在仅0.03 MPa作用力下,可产生18.49 V的最大输出电压和7.88μW cm^-2的功率密度.同时,该器件在循环5500圈及60天内仍保持优异的压电性能.此外,该器件在包括手指敲击、手腕/肘部弯曲和踩踏等动作传感方面表现出良好的敏感性.这项工作证明了无铅无卤的杂化压电材料在柔性传感和能量收集方面具有巨大的应用潜力.更多还原

【Abstract】 Hybrid organic-inorganic piezoelectrics have received considerable attention in recent years owing to their fascinating performance,facile synthesis,and mechanical flexibility.However,the reported systems usually contain toxic heavy metals or are unstable due to sensitive metal halide bonds in air.In this context,eco-friendly and stable hybrid materials with excellent piezoelectric properties are highly sought after.Here,a new stable zero-dimensional hybrid piezoelectric,[Me-V]₃Mn（SCN）₅（Me-V,1-methyl-[4,4’]-bipyridinium）,based on a pseudo-halogen environmentally friendly anion of SCN-was synthesized.More importantly,the mechanical energy harvesting properties of its flexible composite films,[Me-V]₃Mn（SCN）₅/PBAT（PBAT,polybutylene adipate terephthalate）,with a series of weight ratios（1,5,10,15,and 20 wt%）of [Me-V]₃Mn（SCN）₅ are reported.Experimental results demonstrate that the 15 wt% [Me-V]₃Mn-（SCN）₅/PBAT devices present an exceptional performance in energy harvesting,which can produce a maximum output voltage of 18.49 V and a power density of 7.88 μW cm^-2under an applied force of only 0.03 MPa,catching up with those of the state-of-the-art piezoelectric energy harvesting devices.Meanwhile,a typical device was demonstrated to exhibit excellent mechanical durability under 5500 cycles and environmentally stable over 60 days.Furthermore,the devices also show good sensitivity in monitoring human body motions,including finger tapping,wrist and elbow bending,and foot stepping.This work proves that lead-and halide-free hybrid piezoelectrics can serve as eco-friendly materials for flexible sensing and energy harvesting.更多还原