Structural characterization and electrochemical performance of Ni-doped Co9S8 for Li-ion battery and asymmetric supercapacitor dual applications

Structural characterization and electrochemical performance of Ni-doped Co9S8 for Li-ion battery and asymmetric supercapacitor dual applications

Development of nano-sized electrode materials with unique structural and electrical properties is urgently needed due to their vital roles in advanced energy storage systems. Adhering to that. Ni-doped Co9S8 nanoparticles were directly prepared by a facile solvothermal method for implementation as a...

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Bibliographic Details
Published in:Physica. B, Condensed matter Condensed matter, 2022-04, Vol.630, p.413707, Article 413707
Main Authors: Sanad, Moustafa M.S., Arafat, Shadia W., Heiba, Zein K., Elshimy, Hassan
Format: Article
Language:eng
Subjects:
Anodes
Batteries
Battery cycles
Capacitance
Cobalt sulfide
Diffraction
Electrical properties
Electrochemical analysis
Electrode materials
Electrodes
Energy storage
Functional properties
Lithium-ion batteries
Nanoparticles
Nickel
Oxidation
Rechargeable batteries
Rietveld method
Storage systems
Structural analysis
Sulfide nanoparticles
Supercapacitors
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Summary:Development of nano-sized electrode materials with unique structural and electrical properties is urgently needed due to their vital roles in advanced energy storage systems. Adhering to that. Ni-doped Co9S8 nanoparticles were directly prepared by a facile solvothermal method for implementation as active anodes in rechargeable Li-ion batteries and supercapacitors. X-ray diffraction analysis using Rietveld method revealed a single Co9S8 phase with cubic structure (Fm3‾m), confirming the incorporation of Ni ions into the Co9S8 lattice replacing Co ions mainly at octahedral sites. The particle size and morphology were examined by HRTEM images taken at different magnifications. The XPS measurements verified the presence of Ni ions in the Co9S8 matrix and determined the cations oxidation states. The as-prepared nano-Ni@Co9S8 anode material delivered high discharge and charge capacities ∼764 and 520 mAhg−1, respectively in the initial cycle of Li-ion battery. The fabricated Ni@Co9S8 supercapacitor demonstrated good specific capacitance ∼312 F g−1 with high capacitance retention ∼96% after 700 cycles which decreased to 206 F g−1 after 1600 cycles. Meanwhile, a sharp loss in its capacitance by 36% was happened in the subsequent 900 cycles achieving about 206 F g−1 after 1600 cycles. •Modified cubic structure of Ni-doped Co9S8 nanoparticles was synthesized via facile solvothermal synthesis.•XPS analysis revealed the existence of Ni ions in the Co9S8 matrix and the cations oxidation states.•Nano-Ni@Co9S8 anode material delivered high specific discharge capacity 1660 mAhg−1 in Li-ion batteries.•The asymmetric supercapacitor of Ni@Co9S8 displayed the maximum specific capacitance ∼363 F g−1 at 5 mV s−1
ISSN:0921-4526
1873-2135