Ultra-low CNTs filled high-performance fast self-healing triboelectric nanogenerators for wearable electronics. (26th May 2021)

• Record Type: Journal Article
• Authors: Liu, Panlei; Sun, Na; Mi, Yuanyuan; Luo, Xiaohang; Dong, Xiaoxiao; Cai, Jiaye; Jia, Xilai; Ramos, Melvin A.; Hu, Travis Shihao; Xu, Quan
• Is Part Of: Composites science and technology. Volume 208(2021)
• Publication Date: 2021-05-26
• Subjects: CNTs -- PVA hydrogel -- Self-healing -- Triboelectric nanogenerator -- Wearable electronics; Composite materials -- Periodicals; Composite materials; Fibrous composites; Periodicals; 620.118
• DOI: 10.1016/j.compscitech.2021.108733
• Languages: English
• ISSNs: 0266-3538

Abstract

Abstract: Self-healing triboelectric nanogenerators (SH-TENGs) with fast self-healing, high output performance, and wearing comfort have wide and promising applications in wearable electronic devices. This work presents a high-performance hydrogel-based SH-TENG, which consists of a high dielectric triboelectric layer (HDTL), a self-healing hydrogel electrode layer (SHEL), and a physical cross-linking layer (PCLL). Carbon nanotubes (CNTs), obtained by a chemical vapor deposition (CVD) method, were added into polydimethylsiloxane (PDMS) to produce the HDTL. Compared with pure PDMS, the short-circuit transferred charge (44 nC) and the open circuit voltage (132 V) are doubled for PDMS with 0.01 wt% CNTs. Glycerin, polydopamine particles (PDAP) and graphene were added to poly (vinyl alcohol) (PVA) to prepare the self-healing hydrogel electrode layer. SHEL can physically self-heal in ~1 min when exposed to air. The self-healing efficiency reaches up to 98%. The PCLL is made of poly(methylhydrosiloxane) (PMHS) and PDMS. It forms a good physical bond between the hydrophilic hydrogel and hydrophobic PDMS layers. The electric output performance of the SH-TENG can reach 94% of the undamaged one in 1 min. The SH-TENG (6 × 6 cm 2 ) exhibits good stability and superior electrical performance, enabling it to power 37 LEDs simultaneously. Graphical abstract: Image 1