One-stop fabrication of triboelectric nanogenerator based on 3D printing

Triboelectric nanogenerator (TENG) is suitable for collecting low frequency and weak mechanical energy, which has great prospects in powering distributed wireless sensor network nodes. Seeking economical, simple, and efficient fabrication method is highly interesting for researchers who focus on green innovation energy development. Here, we proposed a one-stop fabrication method of the TENG based on three-dimensional (3D) printing. A series of functional printing inks were first prepared by doping nickel powders and polytetrafluoroethylene micro particles into the Dragon Slow Skin 10 (DSS10) substrate with different proportions. Each layer of the TENG in contact-separation mode can be printed in sequence with prepared inks at a programmable three-axis translation stage, which is of complete encapsulation, isotropy, flexibility, and stretchability. On the basis, the 3D-printed plantar energy collector and energy-harvesting bracelet are fabricated and implanted on the soles and wrists, respectively, which can collect biomechanical energy and continuously power portable electronic devices including electronic watch and thermometer. This work provides the advanced fabrication strategy for TENG with low cost and environmental friendliness, which demonstrates great prospects of TENG in standardized and mass manufacturing.