Self‐Powered Integrated Sensing System with In‐Plane Micro‐Supercapacitors for Wearable Electronics
Weiwen Wang, Liqiang Xu, Lun Zhang, Aimin Zhang, Jihai Zhang
Abstract
Abstract Self‐powered integrated sensor with high‐sensitivity physiological signals detection is indispensable for next‐generation wearable electronic devices. Herein, a Ti 3 C 2 T x /CNTs‐based self‐powered resistive sensor with solar cells and in‐plane micro‐supercapacitors (MSCs) is successfully realized on a flexible styrene–ethylene/butylene–styrene (SEBS) electrospinning film. The prepared Ti 3 C 2 T x /CNTs@SEBS/CNTs nanofiber membranes exhibit high electrical conductivity and mechanical flexibility. The laser‐assisted fabricated Ti 3 C 2 T x /CNTs based‐MSCs demonstrate a high areal energy density of 52.89 and 9.56 µWh cm −2 with a corresponding areal power density of 0.2 and 4 mW cm −2 . Additionally, the MSCs exhibit remarkable capacity retention of 90.62% after 10 000 cycles. Furthermore, the Ti 3 C 2 T x /CNTs based‐sensor exhibits real‐time detection capability for human facial micro‐expressions and pulse single under physiological conditions. The repeated bending/release tests indicate the long‐time cycle stability of the Ti 3 C 2 T x /CNTs based‐sensor. Owing to the excellent sensing performance, the sensing array was also fabricated. It is believed that this work develops a route for designing a self‐powered sensor system with flexible production, high performance, and human‐friendly characteristics for wearable electronics.