Issue 20, 2024

Interlayer ionic diffusion driven in situ QD-deposition in the Co9S8–LDH hybrid supercapacitor electrode

Abstract

The micro/nano-structural design of 2D interlayers greatly enhances the electrochemical energy and kinetics of the supercapacitor electrode. Herein, a hetero-Co9S8 QD-doped 2D CoNi-LDH with the proper content was constructed through diverse sulfurization time, showing a 3D flower-like microsphere. The highly dispersed active QDs on 2D layers promoted both rapid ion/electron transfer kinetics and electrochemical storage capacity, which were evidenced by experiments and density functional theory calculations. As a result, the assembled hybrid supercapacitor QDs-Co9S8/CoNi-LDH//activated carbon displays a maximum energy density of 33.3 Wh kg−1 at a power density of 820.0 W kg−1. Furthermore, the in-depth analysis of interlayer ion diffusion and formation of quantum dots in heterostructure provides a good way for synthesizing high-performance electrode materials with adjustable size and composition.

Graphical abstract: Interlayer ionic diffusion driven in situ QD-deposition in the Co9S8–LDH hybrid supercapacitor electrode

Supplementary files

Article information

Article type
Research Article
Submitted
02 Jun 2024
Accepted
02 Aga 2024
First published
03 Aga 2024

Mater. Chem. Front., 2024,8, 3280-3289

Interlayer ionic diffusion driven in situ QD-deposition in the Co9S8–LDH hybrid supercapacitor electrode

Y. Zhang, N. Xu, J. Xu, C. Shan, J. Chen, L. Guo, L. Qin, F. Wu and W. Huang, Mater. Chem. Front., 2024, 8, 3280 DOI: 10.1039/D4QM00462K

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