Fused Ni9S6-Co9S8 heterojunction anchored on porous graphitic carbon for high-performance asymmetric supercapacitors
Journal
Journal of Alloys and Compounds
Journal Volume
1026
Start Page
180481
ISSN
0925-8388
Date Issued
2025-05-05
Author(s)
Kulandaivel, Thirumoorthy
Gopalakrishnan, Mohan
Limphirat, Wanwisa
Liu, Wei-Ren
Pattananuwat, Prasit
Kheawhom, Soorathep
Abstract
Despite their high conductivity and surface area, carbon substrates often suffer from poor dispersion and limited functional groups, hindering their effective integration with active materials in supercapacitors (SCs). Here, we present a fused bimetallic heterojunction (Ni9S6-Co9S8@FGC) anchored on glucose-derived porous graphitic carbon balls, and synthesized via a one-step hydrothermal approach. This design combines the electrochemical benefits of nickel and cobalt sulfides with the structural stability and high porosity of graphitic carbon. The Ni9S6-Co9S8@FGC/NF electrode achieves a remarkable specific capacitance of 885 F g⁻1 at 0.5 A g⁻1, surpassing the performance of Co9S8@FGC/NF (556 F g⁻1) and Ni9S6@FGC/NF (270 F g⁻1). The asymmetric supercapacitor (ASC) device achieves impressive energy and power density, successfully powering a red LED light for 30 min. These findings highlight the potential of fused bimetallic heterojunctions in addressing key challenges in energy storage, offering a scalable and sustainable pathway for advanced ASCs.
Subjects
Graphitic carbon balls
Heterojunction
High energy density
Supercapacitor
Synergistic effect
Publisher
Elsevier BV
Type
journal article