Issue 12, 2023

Exploring the feasibility of a two-dimensional layered cobalt-based coordination polymer for supercapacitor applications: effect of electrolytic cations

Abstract

Coordination polymers have attracted much interest in energy-related applications due to their adaptable structures and unique photophysical and chemical properties. In this study, a coordination polymer, Co-CP, was synthesized using a mixed ligand strategy via a slow diffusion technique. Single-crystal X-ray diffraction studies confirmed the characteristic two-dimensional structure of Co-CP, and plate-like morphology was authenticated through SEM images. Co-CP facilitates ion transport and efficient charge transfer processes, making it an ideal active material for supercapacitor applications. The results from the electrochemical studies demonstrate excellent supercapacitor properties for Co-CP, exhibiting a specific capacitance of 1092 F g−1 at 1.5 A g−1 in 7 M NaOH. Furthermore, the kinetic effect of the electrolyte cation was also investigated in a two-electrode asymmetric supercapacitor (ASC) system by preparing three different gels (NaOH-PVA, KOH-PVA, and LiOH-PVA). Similar trends were observed for the ASC device, with the highest energy density of 17 W h Kg−1 at a power density of 1200 W Kg−1 in NaOH-PVA gel. Overall, the results suggest that Co-CP is a promising active material for supercapacitor applications, and the choice of electrolyte cation has a remarkable impact on the electrochemical performance of the device. This study provides valuable insights for the development and optimization of high-performance supercapacitors based on coordination polymers.

Graphical abstract: Exploring the feasibility of a two-dimensional layered cobalt-based coordination polymer for supercapacitor applications: effect of electrolytic cations

Supplementary files

Article information

Article type
Paper
Submitted
07 aug 2023
Accepted
09 okt 2023
First published
10 okt 2023
This article is Open Access
Creative Commons BY-NC license

Energy Adv., 2023,2, 2119-2128

Exploring the feasibility of a two-dimensional layered cobalt-based coordination polymer for supercapacitor applications: effect of electrolytic cations

R. Deka, S. Rathi and S. M. Mobin, Energy Adv., 2023, 2, 2119 DOI: 10.1039/D3YA00378G

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