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A self-template strategy to prepare hollow NiMoS4 nanospheres supported on Ni foam as advanced supercapacitor electrodes.
- Source :
-
Electrochimica Acta . Apr2020, Vol. 338, pN.PAG-N.PAG. 1p. - Publication Year :
- 2020
-
Abstract
- Pseudocapacitor has recently emerged as an important electrical energy storage technology that plays a critical role in portable electronic device, hybrid electric vehicle, backup energy system, and so on. In spite of the great advances, preparing ultra-stable pseudocapacitor with excellent electrochemical performance is still very challenging. Herein, we developed a simple but novel self-template method to synthesize hierarchical hollow NiMoS 4 nanospheres with ultrathin shell thickness. During the preparation, nickel-molybdenum oxides coated SiO 2 precursors were firstly synthesized. After a sulfidation process with Na 2 S under hydrothermal condition, the precursors were transformed into hierarchical hollow NiMoS 4 nanospheres. Simultaneously, the interior SiO 2 was well etched by tuning the initial Ni/S molar ratio. In addition, hollow NiMoS 4 nanospheres with different shell thickness were also prepared. Remarkably, the obtained NiMoS 4 nanospheres show a very high electrochemical activity due to their fascinating structural and compositional features. The electrode prepared from the NiMoS 4 nanospheres delivers a high specific capacity of 1094 C g−1 current density of 1 A g−1 with enhanced cycling stability of 97.95% capacitance retention after 10,000 cycles, making them to be potential electrode materials for SCs and other related energy storage devices. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00134686
- Volume :
- 338
- Database :
- Academic Search Index
- Journal :
- Electrochimica Acta
- Publication Type :
- Academic Journal
- Accession number :
- 142003009
- Full Text :
- https://doi.org/10.1016/j.electacta.2020.135897