Ultralight, Elastic, Hybrid Aerogel for Flexible/Wearable Piezoresistive Sensor and Solid–Solid/Gas–Solid Coupled Triboelectric Nanogenerator. Issue 34 (17th October 2022)

• Record Type: Journal Article
• Authors: Huang, Tianci; Long, Yong; Dong, Zilong; Hua, Qilin; Niu, Jianan; Dai, Xinhuan; Wang, Jiangwen; Xiao, Junfeng; Zhai, Junyi; Hu, Weiguo
• Is Part Of: Advanced science. Volume 9:Issue 34(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-10-17
• Subjects: aerogel -- multifunction -- piezoresistive sensors -- triboelectric nanogenerators; Science -- Periodicals; 505
• DOI: 10.1002/advs.202204519
• Languages: English
• ISSNs: 2198-3844

Abstract

Abstract: Aerogels have been attracting wide attentions in flexible/wearable electronics because of their light weight, excellent flexibility, and electrical conductivity. However, multifunctional aerogel‐based flexible/wearable electronics for human physiological/motion monitoring, and energy harvest/supply for mobile electronics, have been seldom reported yet. In this study, a kind of hybrid aerogel (GO/CNT HA) based on graphene oxide (GO) and carboxylated multiwalled carbon nanotubes (CMWCNTs) is prepared which can not only used as piezoresistive sensors for human motion and physiological signal detections, but also as high performance triboelectric nanogenerator (TENG) coupled with both solid–solid and gas–solid contact electrifications (CE). The repeatedly loading–unloading tests with 20 000 cycles exhibit its high and ultrastable piezoresistive sensor performances. Moreover, when the obtained aerogel is used as the electrode of a TENG, high electric output performance is produced due to the synergistic effect of solid–solid, and gas–solid interface CEs (3D electrification: solid–solid interface CE between the two solid electrification layers; gas–solid interface CE between the inner surface of GO/CNT HA and the air filled in the aerogel pores). This kind of aerogel promises good applications for human physiological/motion monitoring and energy harvest/supply in flexible/wearable electronics such as piezoresistive sensors and flexible TENG. Abstract : A kind of conductive, ultralight, elastic, hybrid aerogel is prepared by simply physical crosslinking of graphene oxide nanosheets and carboxylated multiwalled carbon nanotubes (CMWCNTs). Piezoresistive sensors for multimode physiological/human motion signal detections with long‐term ultrastability are successfully achieved due to the 3D network structure. High‐performance triboelectric nanogenerator (TENG) is based on the coupling of solid–solid and gas–solid contact electrifications.