期刊
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
卷 2, 期 4, 页码 809-815出版社
AMER CHEMICAL SOC
DOI: 10.1021/sc400472z
关键词
Hollow hexagonal nanoplates; NiCo2S4; Supercapacitors; Kirkendall effect
资金
- National Natural Science Foundation of China [21171006]
In this study, the binary transition metal sulfide NiCo2S4 with a novel hollow hexagonal nanoplate (HHNs) structure has been synthesized through a sacrificial template method based on the Kirkendall effect. The hollow nanoplates have an average diameter of about 200 nm, thickness of about SO nm, and shell thickness of about 10 nm. The resulting samples were characterized by means of XRD, XPS, EDX, SEM, TEM, and HRTEM. The electrochemical characterization results demonstrate that NiCo2S4 hollow hexag,onal nanoplates exhibit a high specific capacitance of 437 F g(-1) in a 3 M KOH aqueous electrolyte at a current rate of 1 A g(-1), along with a superior rate capability and Coulombic efficiency stability, indicating their potential application as electrode materials for supercapacitors.
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