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Thread‐like Supercapacitors Based on One‐Step Spun Nanocomposite Yarns
Author(s) -
Meng Qinghai,
Wang Kai,
Guo Wei,
Fang Jin,
Wei Zhixiang,
She Xilin
Publication year - 2014
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.201303419
Subject(s) - supercapacitor , materials science , thread (computing) , carbon nanotube , nanocomposite , polyaniline , capacitance , spinning , coating , polyvinyl alcohol , composite number , electronics , nanotechnology , composite material , polymer , electrode , computer science , electrical engineering , chemistry , engineering , polymerization , operating system
Thread‐like electronic devices have attracted great interest because of their potential applications in wearable electronics. To produce high‐performance, thread‐like supercapacitors, a mixture of stable dispersions of single‐walled carbon nanotubes and conducting polyaniline nanowires are prepared. Then, the mixture is spun into flexible yarns with a polyvinyl alcohol outer sheath by a one‐step spinning process. The composite yarns show excellent mechanical properties and high electrical conductivities after sufficient washing to remove surfactants. After applying a further coating layer of gel electrolyte, two flexible yarns are twisted together to form a thread‐like supercapacitor. The supercapacitor based on these two yarns (SWCNTs and PAniNWs) possesses a much higher specific capacitance than that based only on pure SWCNTs yarns, making it an ideal energy‐storage device for wearable electronics.