Tin sulfide dendritic hybrids enhanced by metallic carbon nanotubes for superior supercapacitor performance

• Published in: Journal of alloys and compounds 2025-01, Vol.1010, p.177582, Article 177582
• Main Authors: Mishra, Dhananjay, Kumar, Niraj, Patil, Teja M., Na, Taehui, Jin, Sung Hun
• Format: Article
• Language: English
• Subjects: Cyclic stability; Dendritic SnS₂/m-SWNT; Electrochemical performance; Hierarchical hybrid-architecture; Renewable energy storage; Supercapacitors
• ISSN: 0925-8388
• DOI: 10.1016/j.jallcom.2024.177582

This study presents a facile, one-step solvothermal approach to enhance the performance of SnS2-based supercapacitor electrodes through the incorporation of metallic single-walled carbon nanotubes (m-SWNTs) via a one-step solvothermal method. The resulting dendritic heterostructures exhibit significantly improved electrochemical properties compared to pristine SnS2. Comprehensive characterization using XRD, XPS, FE-SEM, and BET analysis reveals that m-SWNT incorporation leads to a significant 111.3 % increase in specific surface area and a 255.1 % increase in pore volume for the optimized SNSC5 sample. This structural modification translates to enhanced electrochemical performance, with SNSC5 demonstrating a high specific capacitance of 161 F.g−1 at 1 A.g−1, excellent cyclic stability (94.2 % retention after 5000 cycles), and a high power density of 84.7 Wkg−1. The synergistic effect of the dendritic morphology and m-SWNT network facilitates improved electron transport and ion accessibility. Furthermore, a symmetric solid-state supercapacitor device based on SNSC5 successfully powered LEDs when charged by a solar panel, showcasing its potential for practical energy storage applications. This work provides valuable insights into the design of high-performance electrode materials for next-generation supercapacitors. •Facile, One-step synthesis method for m-SWNT/SnS2 heterostructure.•Dendritic morphology enhances ion accessibility and electron transport, confirmed by SEM and electrochemical analyses.•m-SWNT incorporation increases specific surface area by 112 % and pore volume by 255.1 %.•Optimization of m-SWNT concentration with SnS2 for electrochemical performance.