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NiS Hollow Spheres for High‐Performance Supercapacitors and Non‐Enzymatic Glucose Sensors
Author(s) -
Wei Chengzhen,
Cheng Cheng,
Zhao Junhong,
Wang Yan,
Cheng Yanyan,
Xu Yazhou,
Du Weimin,
Pang Huan
Publication year - 2015
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.201403198
Subject(s) - kirkendall effect , spheres , supercapacitor , capacitance , materials science , electrode , electrochemistry , hydrothermal circulation , nanotechnology , chemical engineering , chemistry , metallurgy , physics , astronomy , engineering
Abstract α‐NiS and β‐NiS hollow spheres were successfully synthesized via the Kirkendall effect under different hydrothermal conditions. The obtained α‐NiS and β‐NiS hollow spheres were evaluated as electrode materials for supercapacitors. Importantly, the α‐NiS hollow sphere electrode has a large specific capacitance (562.3 F g −1 at 0.60 A g −1 ) and good cycling property (maintaining about 97.5 % at 2.4 A g −1 after 1000 cycles). Furthermore, the as‐prepared α‐NiS and β‐NiS hollow spheres were successfully applied to construct electrochemical glucose sensors. Especially, the α‐NiS hollow spheres exhibit a good sensitivity (155 μA mM −1 cm −2 ), low detection limit (0.125 μ M ), and a wide linear range.