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Synthesis and Characterization of Highly Uniform CuCo 2 S 4 Ball‐in‐Ball Hollow Nanospheres as High Performance Electrode for Supercapacitors
Author(s) -
Lee Young Hun,
Kang Bong Kyun,
Kim Min Seob,
Choi Hyung Wook,
Choi Dong Soo,
Kumar Mohit,
Yoon Dae Ho
Publication year - 2018
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.201700936
Subject(s) - materials science , supercapacitor , electrochemistry , capacitance , ball (mathematics) , chemical engineering , ball mill , electrode , nanotechnology , ion , composite material , chemistry , geometry , organic chemistry , mathematics , engineering
Highly uniform and monodispersed CuCo 2 S 4 ball‐in‐ball hollow nanospheres (HNSs) are successfully synthesized from CuCo‐glycerate nanospheres (NSs) precursors via a facile two‐step solvothermal process. The most influential parameter in anion exchange reaction between glycerate and sulfur ion is the solvothermal time, which plays a significant role in enhancing the structural and electrochemical properties. Impressively, CuCo 2 S 4 ball‐in‐ball HNSs obtained through a sulfurization reaction time of 18 h show high capacitance (442 F g −1 at current density of 0.5 A g −1 ) and superior electrochemical stability (84.5% at 5 A g −1 after 5000 cycles), which can realize high‐performance materials for supercapacitors.