Premium
High‐Performance Two‐Ply Yarn Supercapacitors Based on Carbon Nanotube Yarns Dotted with Co 3 O 4 and NiO Nanoparticles
Author(s) -
Su Fenghua,
Lv Xiaoming,
Miao Menghe
Publication year - 2015
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.201401862
Subject(s) - supercapacitor , materials science , carbon nanotube , yarn , capacitance , composite material , non blocking i/o , composite number , power density , nanotechnology , electrode , power (physics) , biochemistry , chemistry , physics , quantum mechanics , catalysis
Yarn supercapacitors are promising power sources for flexible electronic applications that require conventional fabric‐like durability and wearer comfort. Carbon nanotube (CNT) yarn is an attractive choice for constructing yarn supercapacitors used in wearable textiles because of its high strength and flexibility. However, low capacitance and energy density limits the use of pure CNT yarn in wearable high‐energy density devices. Here, transitional metal oxide pseudocapacitive materials NiO and Co 3 O 4 are deposited on as‐spun CNT yarn surface using a simple electrodeposition process. The Co 3 O 4 deposited on the CNT yarn surface forms a uniform hybridized CNT@Co 3 O 4 layer. The two‐ply supercapacitors formed from the CNT@Co 3 O 4 composite yarns display excellent electrochemical properties with very high capacitance of 52.6 mF cm −2 and energy density of 1.10 μWh cm −2 . The high performance two‐ply CNT@Co 3 O 4 yarn supercapacitors are mechanically and electrochemically robust to meet the high performance requirements of power sources for wearable electronics.