All-printed soft triboelectric nanogenerator for energy harvesting and tactile sensing

摘要

Rapid advancements in flexible and multifunctional electronics bring challenges to the corresponding power suppliers.Soft triboelectric nanogenerator (TENG),as a promising route to satisfy the demands of various selfpowered sources and energy harvesting devices,has been developed in this study via facile all-printing method.The nanogenerator features a thin film with micro patterned friction silicone layers,which is fabricated through direct ink writing technology.Wrinkled silver electrode is sandwiched and protected by silicone layers,and constructed through prestrain,release,and buckling process based on inkjet printing technology.As an experimental result,TENG with 100 prestrain produces the maximum output voltage of 44.16 V at the frequency of 5 Hz and external force of 10 N,higher than the pristine nanogenerator.The output voltage of these TENGs could be enhanced slightly when it is stretched to a certain degree.The as-prepared TENG can work for biomechanical energy harvesting driven by human motions and instantaneously power 20 commercial Light Emitting Diodes (LEDs).Moreover,the all-printed soft TENG arrays show potential applications in tactile sensor for touch perception.Our work opens a new idea for fabrication of flexible and wearable TENG based on printing technology to shorten fabrication cycle,simplify individual design and make it more accessible for practical application.