Premium
Hierarchical NiCo 2 S 4 Nanotube@NiCo 2 S 4 Nanosheet Arrays on Ni Foam for High‐Performance Supercapacitors
Author(s) -
Chen Haichao,
Chen Si,
Shao Hongyan,
Li Chao,
Fan Meiqiang,
Chen Da,
Tian Guanglei,
Shu Kangying
Publication year - 2016
Publication title -
chemistry – an asian journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.18
H-Index - 106
eISSN - 1861-471X
pISSN - 1861-4728
DOI - 10.1002/asia.201500972
Subject(s) - nanosheet , capacitance , materials science , supercapacitor , nanotube , nanostructure , nanotechnology , chemical engineering , capacitive sensing , phase (matter) , electrode , carbon nanotube , chemistry , computer science , organic chemistry , engineering , operating system
Hierarchical NiCo 2 S 4 nanotube@NiCo 2 S 4 nanosheet arrays on Ni foam have been successfully synthesized. Owing to the unique hierarchical structure, enhanced capacitive performance can be attained. A specific capacitance up to 4.38 F cm −2 is attained at 5 mA cm −2 , which is much higher than the specific capacitance values of NiCo 2 O 4 nanosheet arrays, NiCo 2 S 4 nanosheet arrays and NiCo 2 S 4 nanotube arrays on Ni foam. The hierarchical NiCo 2 S 4 nanostructure shows superior cycling stability; after 5000 cycles, the specific capacitance still maintains 3.5 F cm −2 . In addition, through the morphology and crystal structure measurement after cycling stability test, it is found that the NiCo 2 S 4 electroactive materials are gradually corroded; however, the NiCo 2 S 4 phase can still be well‐maintained. Our results show that hierarchical NiCo 2 S 4 nanostructures are suitable electroactive materials for high performance supercapacitors.