Sahoo Supriya, Kothavade Premkumar Anil, Naphade Dipti R, Torris Arun, Praveenkumar Balu, Zaręba Jan K, Anthopoulos Thomas D, Shanmuganathan Kadhiravan, Boomishankar Ramamoorthy
Department of Chemistry and Centre for Energy Science, Indian Institute of Science Education and Research (IISER), Pune, Dr Homi Bhabha Road, Pune - 411008, India.
Polymer Science and Engineering Division, CSIR-National Chemical Laboratory, Dr Homi Bhabha Road, Pune, 411008, Maharashtra, India.
Mater Horiz. 2023 Jul 31;10(8):3153-3161. doi: 10.1039/d3mh00444a.
Three-dimensional printing (3DP) is an emerging technology to fabricate complex architectures, necessary to realize state-of-the-art flexible and wearable electronic devices. In this regard, top-performing devices containing organic ferro- and piezoelectric compounds are desired to circumvent significant shortcomings of conventional piezoceramics, toxicity and high-temperature device processibility. Herein, we report on a 3D-printed composite of a chiral ferroelectric organic salt {[MeCCH(Me)NH][BF]} (1) with a biodegradable polycaprolactone (PCL) polymer that serves as a highly efficient piezoelectric nanogenerator (PENG). The ferroelectric property of 1 originates from its polar tetragonal space group 4, verified by - loop measurements. The ferroelectric domain characteristics of 1 were further probed by piezoresponse force microscopy (PFM), which gave characteristic 'butterfly' and hysteresis loops. The PFM amplitude drive voltage measurements gave a relatively high magnitude of the converse piezoelectric coefficient for 1. PCL polymer composites with various weight percentages (wt%) of 1 were prepared and subjected to piezoelectric energy harvesting tests, which gave a maximum open-circuit voltage of 36.2 V and a power density of 48.1 μW cm for the 10 wt% 1-PCL champion device. Furthermore, a gyroid-shaped 3D-printed 10 wt% 1-PCL composite was fabricated to test its practical utility, which gave an excellent output voltage of 41 V and a power density of 56.8 μW cm. These studies promise the potential of simple organic compounds for building PENG devices using advanced manufacturing technologies.
三维打印（3DP）是一种用于制造复杂结构的新兴技术，这对于实现先进的柔性和可穿戴电子设备而言是必不可少的。在这方面，人们期望性能卓越的包含有机铁电和压电化合物的设备能够克服传统压电陶瓷的重大缺点，即毒性和高温器件加工性。在此，我们报道了一种手性铁电有机盐{[MeCCH(Me)NH][BF]}（1）与可生物降解的聚己内酯（PCL）聚合物的3D打印复合材料，该复合材料可作为高效的压电纳米发电机（PENG）。1的铁电特性源于其极性四方空间群4，这通过电滞回线测量得到了验证。通过压电响应力显微镜（PFM）进一步探究了1的铁电畴特性，得到了特征性的“蝴蝶”和磁滞回线。PFM振幅-驱动电压测量给出了1相对较高的逆压电系数值。制备了具有不同重量百分比（wt%）的1的PCL聚合物复合材料，并进行了压电能量收集测试，对于10 wt%的1-PCL最佳器件，其最大开路电压为36.2 V，功率密度为48.1 μW/cm²。此外，制造了一个螺旋状的3D打印10 wt%的1-PCL复合材料以测试其实际效用，其输出电压高达41 V，功率密度为56.8 μW/cm²。这些研究表明使用先进制造技术构建PENG器件的简单有机化合物具有潜力。
