Issue 13, 2025

CoS2/Bi2S3 nanoparticles embedded in self-supporting Pien Tze Huang graded porous carbon for enhancing supercapacitor performance

Abstract

The limited specific capacitance and cycling stability of current electrochromic supercapacitors significantly hinder their practical applications. To tackle these challenges, we developed a composite nanoparticle electrode material consisting of CoS2/Bi2S3 and graded porous carbon derived from Pien Tze Huang biowaste (PTHPC) using a straightforward one-step hydrothermal method. Cobalt chloride hexahydrate (CoCl2·6H2O), bismuth nitrate pentahydrate (Bi(NO3)3·5H2O), and sodium thiosulfate pentahydrate (Na2S2O3·5H2O) served as the sources of cobalt, bismuth, and sulfur, respectively. The unique architecture of the composites, characterized by rod-like Bi2S3 embedded within hollow CoS2, creates a larger void space and enhances the electrolyte contact area. This design effectively reduces the electron and ion diffusion distances, which is crucial for improving the electrochemical performance. Notably, the synthesized 0.3Z-CoS2/Bi2S3/PTHPC-20 composite electrode demonstrated exceptional performance, achieving a specific capacitance of 1289.2 F g−1 and an energy density of 64.46 W h kg−1 at a current density of 0.5 A g−1. Furthermore, after rigorous testing involving 10 000 charge/discharge cycles, the electrode retained an impressive 86.7% of its initial capacitance, illustrating its excellent cycling stability and durability. This study highlights the potential of the Y-CoS2/Bi2S3/PTHPC-X composites (where Y represents the total amount of different metals Co and Bi and X represents the mass of PTHPC) as high-performance electrodes for supercapacitors. Their unique structural characteristics and electrochemical properties position them as promising candidates for practical applications in energy storage systems.

Graphical abstract: CoS2/Bi2S3 nanoparticles embedded in self-supporting Pien Tze Huang graded porous carbon for enhancing supercapacitor performance

Supplementary files

Article information

Article type
Paper
Submitted
22 Nov 2024
Accepted
26 Feb 2025
First published
03 Mar 2025

New J. Chem., 2025,49, 5369-5380

CoS2/Bi2S3 nanoparticles embedded in self-supporting Pien Tze Huang graded porous carbon for enhancing supercapacitor performance

X. Huang, Z. Zheng, Q. Yang, Y. Xue, N. Qin, Y. Zhang, P. Xiang, L. Xu and J. Chen, New J. Chem., 2025, 49, 5369 DOI: 10.1039/D4NJ05032K

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements