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Mussel‐Inspired, Biomimetics‐Assisted Self‐Assembly of Co 3 O 4 on Carbon Fibers for Flexible Supercapacitors
Author(s) -
Huang Jun,
Xu Yazhou,
Xiao Yingbo,
Zhu Hui,
Wei Junchao,
Chen Yiwang
Publication year - 2017
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.201700369
Subject(s) - supercapacitor , capacitance , materials science , electrochemistry , electrospinning , power density , electrode , nanotechnology , chemical engineering , carbon fibers , carbon nanofiber , flexibility (engineering) , nanofiber , current density , composite material , carbon nanotube , composite number , polymer , power (physics) , chemistry , physics , statistics , mathematics , quantum mechanics , engineering
Carbon nanofiber (CNF) composites could be promising materials for flexible supercapacitors. However, it is still a challenge to grow uniformly active materials on the surface of fibers and maintain flexibility. Herein, Co 3 O 4 nanoparticle‐decorated CNFs have been produced through the combination of electrospinning technology and a polydopamine‐assisted self‐assembly strategy. The free ‐ standing hybrid electrode exhibited a high capacitance of 418 F g −1 at a current density of 0.5 A g −1 in 2 M KOH solution. In addition, the as ‐ fabricated symmetric supercapacitors (SCs) presented excellent electrochemical performance with a capacitance of 55 F g −1 , an energy density of 14.97 W h kg −1 , and a power density of 5660 W kg −1 . Notably, the symmetric SC device exhibited remarkable electrochemical stability and flexibility (93 % capacitance retention after 2000 cycles and 97 % after bending 100 times to 60°).