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Superelastic Hard Carbon Nanofiber Aerogels
Author(s) -
Yu ZhiLong,
Qin Bing,
Ma ZhiYuan,
Huang Jin,
Li SiCheng,
Zhao HaoYu,
Li Han,
Zhu YinBo,
Wu HengAn,
Yu ShuHong
Publication year - 2019
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201900651
Subject(s) - materials science , composite material , carbon nanofiber , carbon fibers , aerogel , pseudoelasticity , piezoresistive effect , nanofiber , mechanical strength , microstructure , nanotechnology , carbon nanotube , composite number , martensite
Abstract Superelastic carbon aerogels have been widely explored by graphitic carbons and soft carbons. These soft aerogels usually have delicate microstructures with good fatigue resistance but ultralow strength. Hard carbon aerogels show great advantages in mechanical strength and structural stability due to the sp 3 ‐C‐induced turbostratic “house‐of‐cards” structure. However, it is still a challenge to fabricate superelastic hard carbon‐based aerogels. Through rational nanofibrous structural design, the traditional rigid phenolic resin can be converted into superelastic hard carbon aerogels. The hard carbon nanofibers and abundant welded junctions endow the hard carbon aerogels with robust and stable mechanical performance, including superelasticity, high strength, extremely fast recovery speed (860 mm s −1 ), low energy‐loss coefficient (<0.16), long cycle lifespan, and heat/cold‐endurance. These emerging hard carbon nanofiber aerogels hold a great promise in the application of piezoresistive stress sensors with high stability and wide detection range (50 kPa), as well as stretchable or bendable conductors.