A1 Refereed original research article in a scientific journal
Supercapacitive performance of a PEDOT⊃metal-porphyrin framework composite in a concentrated aqueous LiClO4 electrolyte
Authors: Sapkota, Narhari; Jha, Plawan Kumar; Peuronen, Anssi; Kochrekar, Sachin; Mäkilä, Ermei; Kvarnström, Carita; Lehtonen, Ari
Publisher: ROYAL SOC CHEMISTRY
Publication year: 2025
Journal: Journal of Materials Chemistry. C
ISSN: 2050-7526
eISSN: 2050-7534
DOI: https://doi.org/10.1039/d5tc03251b
Publication's open availability at the time of reporting: Open Access
Publication channel's open availability : Partially Open Access publication channel
Web address : https://doi.org/10.1039/D5TC03251B
Self-archived copy’s web address: https://research.utu.fi/converis/portal/detail/Publication/505614766
Lanthanide-based metal-porphyrin framework-poly(3,4-ethylenedioxythiophene) (Ln-MPF-PEDOT) materials are largely underexplored for use in supercapacitor applications in concentrated aqueous electrolytes. In this study, we report the successful synthesis of a new three-dimensional neodymium-porphyrin MOF (Nd-MPF), followed by the in situ oxidative polymerization of PEDOT within its porous channels. The Nd-MPF exhibits excellent structural stability, retaining its crystallinity and framework integrity throughout the polymerization process. Symmetric PEDOT superset of Nd-MPF electrodes demonstrate a wide electrochemical stability window of 1.6 V in concentrated aqueous LiClO4 electrolyte and deliver a high specific capacitance of 166 mF cm-2. The energy and power densities of the PEDOT superset of Nd-MPF electrode are as high as 29 mu Wh cm-2 and 13 mW cm-2, respectively. Finally, our material retains over 75\% of its capacitance after 10 000 continuous galvanostatic charge-discharge cycles, highlighting the potential of PEDOT superset of Nd-MPF as a high-performance supercapacitor electrode material.
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Funding information in the publication:
N. S. gratefully acknowledges the financial support by the Neste and Fortum Foundation. P. K. J. acknowledge the Real Estate Foundation, Finland for the financial support.
