Self-healable and stretchable perovskite-elastomer gas-solid triboelectric nanogenerator for gesture recognition and gripper sensing

• Main Authors: Jiang, Feng, Thangavel, Gurunathan, Lee, Jin Pyo, Gupta, Adit, Zhang, Yufei, Yu, Jian, Yokota, Tomoyuki, Yamagishi, Kento, Zhang, Yihui, Someya, Takao, Lee, Pooi See
• Other Authors: School of Materials Science and Engineering
• Format: Article
• Language: English
• Published: 2025
• Subjects: Engineering; Gestures recognition; Porous composites
• Online Access: https://hdl.handle.net/10356/182124
• Institution: Nanyang Technological University

Gas-solid triboelectric nanogenerators (GS-TENGs) based on porous elastomers provide a promising avenue for the design of self-powered sensors. However, the intrinsic limitation of low electric output in GS-TENGs could affect the accuracy and sensitivity of sensing systems. Here, we develop a porous composite by integrating an adhesive poly(siloxane-diphenylglyoxime-urethane) (PSDU) elastomer with ferroelectric (3,3-difluorocyclobutylammonium)2 CuCl4 [(DF-CBA)2CuCl4] fillers. PSDU, an intrinsically triboelectric negative material with alternating hard-soft segments and supramolecular bonds, imparts excellent compressibility, adhesion, and self-healing properties to the composite. Simultaneously, the incorporation of (DF-CBA)2CuCl4 as functional fillers leverages the formation of a hydrogen bonding network to enhance charge transfer processes. These fillers facilitate charge accumulation through an electric poling process, resulting in a power output improvement that surpasses 1400 times higher than that of a dense PSDU-based GS-TENG. Tapping onto the versatile properties of porous poly(siloxane-diphenylglyoximeurethane)-perovskite (PSDU-PK) GS-TENGs, applications such as hand gesture/food recognition and dual-mode sensing system have been demonstrated, suggesting their promising potential in wearable electronics and smart agriculture.