期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 806, 期 -, 页码 1481-1490出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2019.07.345
关键词
Nickel cobalt sulfide; Microaggregate; Mesoporous structure; Supercapacitor
资金
- National Natural Science Foundation of China [21406056]
- Natural Science Foundation of Heilongjiang Province of China [B2017011]
- Scientific Research Foundation for Post Doctor [LBH-Q17147]
Mesoporous NiCo2S4 materials with high specific surface area and suitable mesopores display excellent supercapacitor performance due to rich electroactive sites and short diffusion paths. Here, the mesoporous NiCo2S4 microaggregates composed of nanoparticles are first successfully prepared by a simple anion exchange method to puff NiCo2O4 cubes. The NiCo2S4 microaggregates possess rich mesoporous structure with high surface area of 63.79m(2)g(-1) and suitable pore size distribution centered at 6.1 nm. The NiCo2S4 microaggregates deliver high specific capacity of 249 mAh g(-1) (at 1 A g(-1)) and good rate capability of 56.2% capacity retention from 1 to 20 A g(-1). The fabricated NiCo2S4//AC ACS exhibits a prominent energy density of 47.9Wh kg(-1) at a power density of 783 W kg(-1) and immensely distinguished cycling stability (98.8% retention of the initial capacitance after 4000 cycles). These remarkable performances can corroborate superiority of the mesoporous structure for improving supercapacitor electrode properties. (C) 2019 Elsevier B.V. All rights reserved.
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