Tuning of Highly Dielectric Calcium Copper Titanate Nanowires To Enhance the Output Performance of a Triboelectric Nanogenerator
Yuping Liu, Ruolin Han, Liuyang Li, Zheng Zhou, Guangxin Chen, Qifang Li
Abstract
The optimization of the capacitance of friction materials has been demonstrated to be an effective method for enhancing the performance of triboelectric nanogenerators (TENGs). For instance, the application of high dielectric nanoparticles can observably enhance the dielectric properties and surface potential of friction materials. In this work, calcium copper titanate nanowires with a large aspect ratio were added to polydimethylsiloxane (PDMS) to prepare composite films. Then, the PDMS film and aluminum foil were used to assemble a simple push-type TENG. The results demonstrate that an extremely low filler concentration can significantly increase the output performance of the TENG without surface treatment. With an optimized weight ratio (5 wt %), the TENG exhibits the highest voltage of 350 V, current density of 0.375 μA/cm2, and power density of 40.7 μW/cm2 and can illuminate 100 light-emitting diodes. Meanwhile, the TENG can effectively harvest energy of different bending degrees of the wrist and elbow. In addition, the device also exhibits superior stability and durability and can charge commercial capacitors. This work provides an effective strategy for the development and preparation of triboelectric generators with excellent output performance.