| Autor: |
Khaladkar, Somnath R., Maurya, Oshnik, Gund, Girish, Sinha, Bhavesh, Dubal, Deepak, Deshmukh, Rajendra, Kalekar, Archana |
| Zdroj: |
ACS Applied Materials & Interfaces; March 2024, Vol. 16 Issue: 9 p11408-11420, 13p |
| Abstrakt: |
Battery-type materials with ultrahigh energy density show great potential for hybrid supercapacitors (HSCs). In this work, we have developed a nickel selenide (NiSe)/reduced graphene oxide (rGO)/graphitic carbon nitride (g-C3N4) ternary composite as a promising positive electrode for hybrid supercapacitors (HSCs). The extended π-conjugated planar layers of g-C3N4promote strong interconnectivity with rGO, which further enhances surface area, surface free energy, and efficient electron/ionic path. Additionally, it establishes clear ion diffusion pathways, serving as ion reservoirs during charge and discharge and facilitating efficient redox reactions. As a result, the NiSe/g-C3N4/rGO nanocomposite electrode displayed a specific capacity of 412.6 mA h g–1at 1 A g–1. Later, the HSC device was assembled using the nanocomposite as the positive electrode and activated carbon as the negative electrode, which delivered an energy density of 65.2 Wh kg–1at a power density of 750 W kg–1. Notably, the HSC device maintained excellent cyclic stability, preserving 93.3% of its initial performance and Coulombic efficiency of 86.6% for 10,000 charge–discharge cycles at 5 A g–1. These findings underscore the potential utility of NiSe/g-C3N4/rGO as a versatile and effective electrode material for the strategic development of HSC devices. |
| Databáze: |
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