A novel electrode for supercapacitors: efficient PVP-assisted synthesis of Ni3S2 nanostructures grown on Ni foam for energy storage.
Dalton Trans
; 49(13): 4050-4059, 2020 Apr 01.
Article
en En
| MEDLINE
| ID: mdl-32073102
ABSTRACT
In this academic research, we report the polyvinylpyrrolidone (PVP) assisted synthesis of a Ni3S2 electrode material containing a plentiful number of active sites on Ni foam by a novel hydrothermal approach. Interestingly, the Ni3S2 electrode is a highly efficient electroactive material, as evidenced by the physical and electrochemical characterization. Based on the physical characterization, the constructed Ni3S2 nano architecture exhibited plentiful electroactive sites, quick charge/discharge transportation and better maximum conductivity, which gave rise to enhanced electrochemical activity for large-scale supercapacitors (SCs). Besides, the electrochemical characterization of the as-developed Ni3S2 electrode obviously displayed a faradaic battery-based redox profile, which is distinct from the profiles of carbon-type materials. The battery-based PVP-assisted Ni3S2 electrode achieved impressive electrochemical activity, namely exceptional SC activity with a superior specific capacity of â¼316.8 mA h g-1 at 2 A g-1 current density, high rate capability with â¼91.4% of capacity retained at 20 A g-1, and superb cycling performance with â¼96.7% of capacity retained at 6 A g-1 after 4000 cycles. Thus, considering the best findings above, the as-developed PVP-assisted Ni3S2 is a highly efficient candidate for SCs and could effectively serve in various advanced energy storage applications.
Texto completo:
1
Banco de datos:
MEDLINE
Idioma:
En
Revista:
Dalton Trans
Asunto de la revista:
QUIMICA
Año:
2020
Tipo del documento:
Article