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- Title
Cauliflower like porous structure of cobalt niobium sulfide@carbon nanotubes for electrode materials to enhance the redox activity in the battery-supercapacitor hybrid device.
- Authors
Yasmeen, Aneeqa; Afzal, Amir Muhammad; Iqbal, Muhammad Waqas; Mumtaz, Sohail; Ouladsmane, Mohamed; Usman, Muhammad; Wabaidur, Saikh Mohammad
- Abstract
Hybrid devices have gained much consideration in recent years due to their exceptional capacity to store energy. These types of devices have astonishing power and energy densities that are much superior to those of supercapacitors and batteries. The hydrothermal method is used to synthesize the cobalt niobium sulfide composite. XRD, XPS, and SEM are used to determine the structural, morphological, crystallinity, and elemental characteristics of the material. We studied the electrochemical performance using the three- and two-electrode assembly. Surface area and electrochemical characteristics of electrode material are estimated using electrochemical impedance spectroscopy (EIS) and Brunauer–Emmett–Teller (BET). In the case of a real device, the achieved value of the specific capacity of CoNb/CNT//PANI@AC is 150 C/g which is much improved compared to the previously reported values. This device demonstrated outstanding functionality by exhibiting an energy density (Ed) of 28.9 Wh/kg, with a power density (Pd) of 1020 W/kg. Besides, the fabricated hybrid supercapacitor showed good cyclic stability up to 2000 cycles by maintaining its specific capacity retention of 80%. Our findings indicate that the cobalt niobium with carbon nanotubes is more appropriate and provides chances to design high-performance energy storage devices.
- Subjects
NIOBIUM; COBALT; POWER density; ENERGY density; ENERGY storage; MESOPOROUS materials; NANOTUBES
- Publication
Applied Nanoscience, 2023, Vol 13, Issue 9, p6471
- ISSN
2190-5509
- Publication type
Article
- DOI
10.1007/s13204-023-02932-0