Double-Sided Laser-Induced Graphene Based Smart Bracelet for Sensing and Energy

For addressing the issue of power consumption and integration level of wearable electronics, this work proposes a smart bracelet based on double-sided laser-induced graphene (LIG) technology both for sensing and energy. Benefiting from the high conductivity of the LIG, the LIG-based triboelectric nanogenerator (LIG-TENG) on the inner side of the bracelet can efficiently convert human kinetic energy into active signals and pulsed electricity. Meanwhile, the micro-supercapacitors (MSCs) on the outer side take advantage of the high surface area of LIG and in-situ store the energy collected by LIG-TENG. Furthermore, the via assisted by unlased polyimide (PI) with optimized parameters realizes valid interconnection and avoids complicated wiring. This smart system in versatile and facile process exhibits great potential in diversified functional requirements.