Affiliation:
1. College of Electronic Information and Optical Engineering Taiyuan University of Technology Taiyuan 030024 China
2. College of Materials Science and Engineering Taiyuan University of Technology Taiyuan 030024 China
3. Shanxi‐Zheda Institute of Advanced Materials and Chemical Engineering Taiyuan 030001 China
Abstract
AbstractSelf‐powered electronic skins (e‐skins), as on‐skin human‐machine interfaces, play a significant role in cyber security and personal electronics. However, current self‐powered e‐skins are primarily constrained by complex fabricating process, intrinsic stiffness, signal distortion under deformation, and inadequate comprehensive performance, thereby hindering their practical applications. Herein, a novel highly stretchable (534.5%), ionic conductive (4.54 S m−1), thermogalvanic (1.82 mV K−1) hydrogel (TGH) is facilely fabricated by a one‐pot method. Owing to the formation of Li+(H2O)n hydration structure, the TGH presents excellent anti‐freezing and non‐drying performance. It remains flexible and conductive (3.86 S m−1) at −20 °C and shows no obvious degradation in the thermoelectrical performance over 10 days. Besides, acting as a self‐powered e‐skin, the TGH combined with deep learning technology for signature recognition and biometric authentication is successfully demonstrated, achieving an accuracy of 92.97%. This work exhibits the TGH‐based e‐skin's tremendous potential in the new generation of human‐computer interaction and information security.
Funder
Natural Science Foundation of Shanxi Province
Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering
Subject
Electrochemistry,Condensed Matter Physics,Biomaterials,Electronic, Optical and Magnetic Materials