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Designing a hierarchical structure of nickel-cobalt-sulfide decorated on electrospun N-doped carbon nanofiber as an efficient electrode material for hybrid supercapacitors.

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Title: Designing a hierarchical structure of nickel-cobalt-sulfide decorated on electrospun N-doped carbon nanofiber as an efficient electrode material for hybrid supercapacitors.
Authors: Abdel-Salam, Ahmed I.1 (AUTHOR), Attia, Sayed Y.2 (AUTHOR), Mohamed, Saad G.1,2 (AUTHOR) saadmohamed@tims.gov.eg, El-Hosiny, Fouad I.3 (AUTHOR), Sadek, M.A.4 (AUTHOR), Rashad, M.M.5,6 (AUTHOR)
Source: International Journal of Hydrogen Energy. Feb2023, Vol. 48 Issue 14, p5463-5477. 15p.
Subjects: Supercapacitor electrodes, Supercapacitors, Energy density, Negative electrode, Doping agents (Chemistry), Electrodes, Cobalt
Abstract: The intent of designing and exploring novel active electrode materials is to enhance the electrochemical performance of supercapacitors. Herein, a hierarchical structure of nickel-cobalt-sulfide nanostructures (NiCo 2 S 4) decorated on the electrospun N -doped carbon nanofiber (CNF), NiCo 2 S 4 @CNF, is manipulated using a one-step and simple hydrothermal approach. The fabricated hierarchical structure of the NiCo 2 S 4 @CNF is featured by a large surface area and a high porosity that serve as ion diffusion channels. Therefore, it manifests high specific capacitance and specific capacity values of 377.2 C g−1 and 754.4 F g−1 at a current density of 1 A g−1, respectively. Furthermore, a NiCo 2 S 4 @CNF//CNF hybrid supercapacitor in which a positive electrode of NiCo 2 S 4 @CNF is assembled with a negative electrode of CNF to estimate the electrochemical performance of the NiCo 2 S 4 @CNF. As a result, the device has a superior energy density of 65.6 and 52.5 Wh kg−1 at a power density of 665 and 1313.8 W kg−1, respectively. Moreover, the device reveals good stability with capacitance retention of 72% after 3000 charge/discharge cycles. These outstanding results enable the designed hierarchical structure of the NiCo 2 S 4 @CNF to be a promising electrode material for supercapacitors (SCs) applications. [Display omitted] • The hierarchical structure of NiCo 2 S 4 @CNF was prepared to be used as an efficient electrode for a hybrid supercapacitor. • NiCo 2 S 4 @the electrospun N -doped CNF has a higher surface area and a high porosity that serves as ion diffusion channels. • NiCo 2 S 4 @CNF hierarchical structure exhibited a specific capacitance of 754.4 F g−1 at a current density of 1 A g−1. • NiCo 2 S 4 @CNF//CNF hybrid supercapacitor showed specific energy of 65.6 W h kg−1 at a specific power of 665 W kg−1. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
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Abstract:The intent of designing and exploring novel active electrode materials is to enhance the electrochemical performance of supercapacitors. Herein, a hierarchical structure of nickel-cobalt-sulfide nanostructures (NiCo 2 S 4) decorated on the electrospun N -doped carbon nanofiber (CNF), NiCo 2 S 4 @CNF, is manipulated using a one-step and simple hydrothermal approach. The fabricated hierarchical structure of the NiCo 2 S 4 @CNF is featured by a large surface area and a high porosity that serve as ion diffusion channels. Therefore, it manifests high specific capacitance and specific capacity values of 377.2 C g−1 and 754.4 F g−1 at a current density of 1 A g−1, respectively. Furthermore, a NiCo 2 S 4 @CNF//CNF hybrid supercapacitor in which a positive electrode of NiCo 2 S 4 @CNF is assembled with a negative electrode of CNF to estimate the electrochemical performance of the NiCo 2 S 4 @CNF. As a result, the device has a superior energy density of 65.6 and 52.5 Wh kg−1 at a power density of 665 and 1313.8 W kg−1, respectively. Moreover, the device reveals good stability with capacitance retention of 72% after 3000 charge/discharge cycles. These outstanding results enable the designed hierarchical structure of the NiCo 2 S 4 @CNF to be a promising electrode material for supercapacitors (SCs) applications. [Display omitted] • The hierarchical structure of NiCo 2 S 4 @CNF was prepared to be used as an efficient electrode for a hybrid supercapacitor. • NiCo 2 S 4 @the electrospun N -doped CNF has a higher surface area and a high porosity that serves as ion diffusion channels. • NiCo 2 S 4 @CNF hierarchical structure exhibited a specific capacitance of 754.4 F g−1 at a current density of 1 A g−1. • NiCo 2 S 4 @CNF//CNF hybrid supercapacitor showed specific energy of 65.6 W h kg−1 at a specific power of 665 W kg−1. [ABSTRACT FROM AUTHOR]
ISSN:03603199
DOI:10.1016/j.ijhydene.2022.11.134