Construction of a nanostructured NiCo2S4/Ni/Ni9S8 composite for energy storage applications
It is necessary to investigate and develop nickel-cobalt sulfide electrodes with superior electrochemical behavior. This work produced the NiCo2S4/Ni/Ni9S8 nanostructure composite (NCS/N/NS) for energy storage in supercapacitors using a solvothermal technique with polyethyleneimine (PEI) as a carbon...
Saved in:
Published in | Solid state sciences Vol. 151; p. 107501 |
---|---|
Main Authors | , , , |
Format | Journal Article |
Language | English |
Published |
Elsevier Masson SAS
01.05.2024
|
Subjects | |
Online Access | Get full text |
Cover
Loading…
Summary: | It is necessary to investigate and develop nickel-cobalt sulfide electrodes with superior electrochemical behavior. This work produced the NiCo2S4/Ni/Ni9S8 nanostructure composite (NCS/N/NS) for energy storage in supercapacitors using a solvothermal technique with polyethyleneimine (PEI) as a carbon source, followed by an hour of annealing in an argon atmosphere, and a hydrothermal method with thiourea as a sulfur and nitrogen source. Outstanding electrochemical energy storage properties are provided by NCS/N/NS. The produced electrode material, NCS/N/NS, demonstrated an exceptional capacitance of 1620 F g−1 (696 C g−1) at 1 A g−1 when employed for SCs. An NCS/N/NS was used as the positively charged electrode and the opposite electrode of commercial AC to build an NCS/N/NS//activated carbon (AC) asymmetric device for practical usage. At 1 A g−1, the asymmetric device produced a specific power of 887 W kg−1 and a unique specific energy of 53 Wh kg−1. Moreover, it exhibits a 100% coulombic efficacy and a 95% capacity retention after 3000 cycles, respectively.
[Display omitted]
•NiCo2S4/Ni/Ni9S8 novel nanocomposite was prepared using a solvothermal method.•The nanocoposite electrode revealed a superb capacitance of 1620 F g−1 (696 C g−1) at 1 A g−1.•The asymmetric device achieved a unique specific energy of 53 Wh kg−1, with a specific power of 887 W kg−1 at 1 A g−1. |
---|---|
ISSN: | 1293-2558 1873-3085 |
DOI: | 10.1016/j.solidstatesciences.2024.107501 |