Bi2S3 nanorods and WO3 elongated blocks integrated to CNFs as a hybrid electrode for enhance the supercapacitor performance

Journal Article

2025

Published in: https://doi.org/10.1016/j.inoche.2024.113872

Inorganic Chemistry Communications

In the pursuit of high-performance supercapacitors, integrating various nanostructured materials has become a key strategy. This work presents a novel hybrid electrode composed of bismuth sulfide (Bi2S3) nanostructures and tungsten trioxide (WO3) elongated blocks integrated into a carbon nanofiber (CNF) matrix via hydrothermal synthesis. Electrochemical tests including cyclic voltammetry, galvanostatic charge–discharge, and electrochemical impedance spectroscopy were conducted on pristine WO3, the composite of WO3-Bi2S3, and the WO3-Bi2S3@CNF hybrid electrode. The hybrid electrode demonstrated a significant improvement in specific capacitance, achieving 1643 F g1 at a current density of 0.5 A g 1, which is ~2.3 times higher than pristine WO3 and ~1.45 times higher than the WO3-Bi2S3 composite. It also exhibited excellent rate capability and cycling stability, retaining a high percentage of capacitance over numerous charge–discharge cycles. The enhanced performance of the hybrid electrode is attributed to the synergistic effects of the high pseudo-capacitance of WO3, the superior conductivity and charge storage capacity of Bi2S3, and the mechanical strength and flexibility of CNFs. This combination supports rapid electron transport and efficient ion diffusion, leading to improved supercapacitor performance. These findings suggest that integrating WO3 elongated blocks and Bi2S3 nanostructures into CNFs offers a promising pathway for developing next-generation supercapacitors with enhanced energy and power capabilities

• Publication Work Type: Research
• Publisher Name: Elsevier