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A Flexible Multifunctional Triboelectric Nanogenerator Based on MXene/PVA Hydrogel
Author(s) -
Luo Xiongxin,
Zhu Laipan,
Wang YiChi,
Li Jiayu,
Nie Jiajia,
Wang Zhong Lin
Publication year - 2021
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.202104928
Subject(s) - triboelectric effect , nanogenerator , materials science , nanotechnology , energy harvesting , voltage , electronic skin , wearable technology , mechanical energy , electrode , fabrication , polyvinyl alcohol , wearable computer , optoelectronics , electrical engineering , piezoelectricity , computer science , energy (signal processing) , composite material , power (physics) , alternative medicine , mathematics , chemistry , pathology , engineering , embedded system , quantum mechanics , medicine , statistics , physics
Triboelectric nanogenerators (TENGs) represent an emerging technology in energy harvesting, medical treatment, and information technology. Flexible, portable, and self‐powered electronic devices based on TENGs are much desired, whereas the complex preparation processes and high cost of traditional flexible electrodes hinder their practical applications. Here, an MXene/polyvinyl alcohol (PVA) hydrogel TENG (MH‐TENG) is presented with simple fabrication, high output performance, and versatile applications. The doping of MXene nanosheets promotes the crosslinking of the PVA hydrogel and improves the stretchability of the composite hydrogel. The MXene nanosheets also form microchannels on surfaces, which not only enhances the conductivity of the hydrogel by improving the transport of ions but also generates an extra triboelectric output via a streaming vibration potential mechanism. The measured open‐circuit voltage of the MH‐TENG reaches up to 230 V even in a single‐electrode mode. The MH‐TENG can be stretched up to 200% of the original length and demonstrates a monotonical increasing relationship between the stretchable length and the short‐circuit voltage. By utilizing the MH‐TENG's outstanding stretchable property and ultrahigh sensitivity to mechanical stimuli, applications in wearable movement monitoring, high‐precision written stroke recognition, and low‐frequency mechanical energy harvesting are demonstrated.