新型杂化金属硫氰化物压电体用于能量收集和动作传感  

A new piezoelectric hybrid metal thiocyanide for energy harvesting and human motion sensing

作　　者：赵盈 安连财 李凯 龚勇吉 郭甜梦 高飞飞 雷阳 李泉文 李伟 卜显和 Ying Zhao;Lian-Cai An;Kai Li;Yong-Ji Gong;Tian-Meng Guo;Fei-Fei Gao;Yang Lei;Quanwen Li;Wei Li;Xian-He Bu(School of Materials Science and Engineering,Smart Sensing Interdisciplinary Science Center,Nankai University&TKL of Metal and Molecule Based Material Chemistry,Tianjin 300350,China;Department of Chemistry and Chemical Engineering,Jinzhong University,Jinzhong 030619,China;College of Materials and Metallurgy,Guizhou University,Guiyang 550025,China)

机构地区：[1]School of Materials Science and Engineering,Smart Sensing Interdisciplinary Science Center,Nankai University&TKL of Metal and Molecule Based Material Chemistry,Tianjin 300350,China [2]Department of Chemistry and Chemical Engineering,Jinzhong University,Jinzhong 030619,China [3]College of Materials and Metallurgy,Guizhou University,Guiyang 550025,China

出　　处：《Science China Materials》2023年第5期1854-1860,共7页中国科学（材料科学（英文版）

基　　金：supported by the National Natural Science Foundation of China(21975132 and 21991143);the Fundamental Research Funds for the Central Universities(63196006);the PhD Candidate Research Innovation Fund of the School of Materials Science and Engineering,Nankai University。

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]_(3)Mn(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.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]_(3)Mn(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]_(3)Mn(SCN)_(5)/PBAT(PBAT,polybutylene adipate terephthalate),with a series of weight ratios(1,5,10,15,and 20 wt%)of[Me-V]_(3)Mn(SCN)_(5)are reported.Experimental results demonstrate that the 15 wt%[Me-V]_(3)Mn(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 7.88μW cm^(−2) under 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.

关 键 词：hybrid organic-inorganic piezoelectrics energy harvesting human motion sensing 

分 类 号：TB34[一般工业技术—材料科学与工程] TP212[自动化与计算机技术—检测技术与自动化装置]