Journal
ELECTROCHIMICA ACTA
Volume 259, Issue -, Pages 617-625Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2017.11.027
Keywords
Electrodeposition; Nickel cobalt sulfide; Hybrid supercapacitor; Energy density
Categories
Funding
- National Key Research and Development Program of China [2016YFC0102700]
- National Natural Science Foundation of China [61671299, 51402190]
- Shanghai Science and Technology Grant [16JC1402000, 17ZR1414100]
- Program of Shanghai Academic/Technology Research Leader [15XD1525200]
- Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutions of Higher Learning [GZ2016005]
- Instrumental Analysis Center of Shanghai Jiao Tong University
- Center for Advanced Electronic Materials and Devices of Shanghai Jiao Tong University
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Bimetallic metal sulfides have been intensely studied as electrode materials for energy storage. However, the synthesis methods are often multi-step. Herein, we proposed a simple one-step electrodeposition of nickel cobalt sulfide nanosheets on 3D Ni nanowires film. The as-synthesized Ni@Ni-Co-S was directly employed as electrode for supercapacitor. Taking advantages of 3D conductive nanostructure for Ni substrate and mesoporous nanosheets nature for active material Ni-Co-S, the as-fabricated electrode exhibits a high capacity of 392.8 C cm(-3) at 0.5 A cm(-3) and excellent rate capability. A hybrid supercapacitor based on Ni@Ni-Co-S positive electrode and rGO-CNTs negative electrode was fabricated for practical supercapacitor application. Our device demonstrated a high energy density of 18.4 mWh cm(-3) at a power density of 254.5 mW cm(-3) and excellent long term cycle performance with 90.5% capacitance retention after 10000 cycles. (c) 2017 Elsevier Ltd. All rights reserved.
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