Facile design and synthesis of nickle-molybdenum oxide/sulfide composites with robust microsphere structure for high-performance supercapacitors

Yang, L. and Huang, M. and Lu, M. and Guan, X. and Wang, G. and Jia, B. (2019) Facile design and synthesis of nickle-molybdenum oxide/sulfide composites with robust microsphere structure for high-performance supercapacitors. Chemical Engineering Journal, 364. pp. 462-474. ISSN 1385-8947

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Abstract

This study has reported a simple strategy for the fabrication of nickle-molybdenum oxide/sulfide composites (NiMo-O-S) with microsphere structure, using a simple two-step method including a facile hydrothermal process and a post solution sulfidation treatment. The electrochemical performance of the as-prepared Ni-Mo-O-S composites is carefully evaluated as the working electrode. Additionally, the effects of material preparation conditions on the specific capacitance of the as-prepared composites are also fully investigated and summarized, including the S2- concentration, sulfidation temperature and reaction time. In this work, high-performance electrode materials could be easily achieved under a wide range of preparation conditions. Specifically, the NiMo-O-S composites could deliver a high specific capacitance of 2177.5 F.g(-1) at a current density of 1 A.g(-1), and after cycling for 5000 times, the specific capacitance could retain 86.25% of its initial value. Besides, the corresponding hybrid supercapacitor (Ni-Mo-O-S//AC HSC) achieves a high energy density of 50.61 Wh.kg(-1) at a power density of 850 W.kg(-1), and possesses excellent longterm electrochemical cycling stability (93.38% capacitance retention after 10,000 cycles). Our work has provided a low-cost, feasible and promising way to prepare high-performance electrode materials for supercapacitors.

Item Type:
Journal Article
Journal or Publication Title:
Chemical Engineering Journal
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/2200/2209
Subjects:
ID Code:
131572
Deposited By:
Deposited On:
27 Jan 2020 15:00
Refereed?:
Yes
Published?:
Published
Last Modified:
16 Sep 2020 05:16